Top 10 Rarest Pokémon in Pokémon Infinite Fusion — Where to Find Them

If you have been playing Pokémon Infinite Fusion for a while, you already know that catching every Pokémon is basically impossible — the game has over 170,000 possible fusions. But among the unfused species, a small group of Pokémon is genuinely hard to find. These are the rarest Pokémon in Infinite Fusion: one-time mythical encounters, quest-gated legendaries, and Pokémon hidden behind requirements so specific that most players walk right past them without ever knowing they were there.

Quick note: pokemon-infinitefusions.site is an unofficial fan guide. We are not affiliated with Nintendo, Game Freak, or the creators of Pokémon Infinite Fusion.

How We Ranked the Rarest Pokémon in Infinite Fusion

Rarity here means more than “legendary.” Almost every legendary in the game is a static encounter you can walk up to, and many of them respawn after you beat the Elite Four again. The truly rare ones are different. We ranked this list by three things: how hard the unlock requirement is, whether you only get one shot at the encounter, and how easy it is to permanently miss the Pokémon in a playthrough.

• One-time encounters: some mythical Pokémon never respawn. If you knock them out, you need a new game, a Wonder Trade, or the Celadon City Black Market to ever see them again.
• Grindy requirements: quests that demand hundreds of hours of Pokédex completion, dozens of side quests, or precise in-game schedules.
• Missable triggers: events tied to karma, time of day, or story flags that are easy to lock yourself out of.

All locations below are verified against the Infinite Fusion dex and the community wiki, and the game version referenced is 6.7.2. If you have not started your journey yet, download Pokémon Infinite Fusion first and keep this guide handy — several entries on this list are missable early.

The 10 Rarest Pokémon in Infinite Fusion

1. Jirachi — The 777-Pokémon Grind

Here is the full breakdown of how to get Jirachi in Infinite Fusion and every other hard-to-find Pokémon. Jirachi is the rarest Pokémon in Infinite Fusion, and it is not close. To unlock the encounter, you must have registered 777 unique Pokémon in your Pokédex, not counting legendaries. That means hundreds of hours of catching, evolving, and trading before the event even becomes available.

Once you hit 777, go to any hotel and sleep for any amount of time. Instead of waking up in your room, you are teleported to a strange dream version of Pallet Town. Walk into the lab, speak to Jirachi, and pick a Pokémon when it asks — then it challenges you to a fight. Here is the twist: no matter how the fight ends, you wake up in your room with a Jirachi waiting in your party or PC. The one you fought and the one you receive are different individuals, so do not assume the one in your PC will match the one you battled.

• Where: any hotel bed, after 777 unique encounters
• Level: 20
• Why it is rare: the 777-encounter requirement is the single biggest grind in the game
• Fusion potential: Jirachi’s balanced 600 base stat total and Steel/Psychic typing make it a premium fusion parent — try pairing it with Metagross or Gardevoir in the fusion calculator to preview the results

2. Arceus — The God Quest

Arceus sits at the top of the post-game mountain, and the climb is brutal. First you need the Azure Flute stone, which is only handed out after you catch Articuno, Zapdos, Moltres, Entei, Raikou, and Suicune — six legendaries of your own. Take them to Eusine at the Ruins of Alph, then to his house in Cherrygrove City, where his Dittos copy all six. In return, he gives you the Azure Flute.

Next, visit Mr. Pokémon on Route 30, then head to the Ice Mountains north of Blackthorn City. Climb through the Ice Cavern to the peak, step into the circle on the ground, and use the Azure Flute to reveal a staircase down to the Hall of Origin. Arceus waits at level 60, and it does not go down quietly. Bring your best team and plenty of Ultra Balls — or save your Master Ball for this one. Our Master Ball guide covers every copy you can collect.

• Where: Hall of Origin, via the Ice Cavern peak north of Blackthorn City
• Level: 60
• Why it is rare: locked behind six other legendary catches plus a multi-map quest chain
• Fusion potential: Arceus is the ultimate fusion flex — every Arceus fusion keeps its signature versatility, so experiment in the calculator before you commit

3. Necrozma — The Prism Marathon

Necrozma has the longest quest chain of any Pokémon on this list, and most of it is pure exploration. Start at the top of the Pokémon Tower in Lavender Town to pick up the Strange Prism quest, then hunt down prisms in Mt. Moon, Cerulean Cave, Mt. Mortar, and Rock Tunnel, returning each one to the pedestals on the tower’s roof.

That is only the warm-up. The quest continues through Route 7, a meeting with Sabrina on the Celadon Mall roof, a prism pedestal next to Koga in Fuchsia City, strange plants you can Cut leading to the Safari Zone, a Strange Fruit in Area 3, and an analysis session with Professor Oak at the Pallet Town dock. Only then does the real path open: back to Mt. Moon, into the cave where you found the first prism, where intense glowing reveals a new tunnel that finally leads to Necrozma at level 70. You will need Surf, Waterfall, Flash, and Cut across the whole quest, so come prepared.

• Where: deep tunnel in Mt. Moon, after the full Strange Prism quest
• Level: 70
• Why it is rare: a dozen quest steps across both regions with almost no hand-holding
• Fusion potential: Psychic typing plus monstrous attacking stats — Necrozma fusions hit like a truck; check combinations in the fusion tool

4. Meloetta — The Week-Long Concert Tour

Meloetta does not ask you to grind — it asks you to keep a calendar. Start the quest in the Saffron City bar during the day on a Saturday, head downstairs to the concert, then slip into the bathroom and wait until night (8pm) to trigger the quest. From there you must recruit five musicians scattered across the regions on specific days and times.

• The drummer, on a small island north of Crimson City
• Two guitarists — one in the Goldenrod underground on Fridays (pay them ₽4000), one in Oricorio Clearing south of Treasure Beach on Wednesday evenings between 5 and 8pm
• The harpist, at the Mt. Moon Observatory on Monday mornings between 5 and 10am, reached by tricky parkour
• The final musician, in Ilex Forest on Tuesday nights between 8pm and midnight, behind a cut tree — tap the up button slowly so you do not scare the sleeping Pokémon

Return to the Saffron bar after each recruit to unlock the next step, and once all five are found, attend the concert on Saturday night. Meloetta appears and joins your party at level 50. Pro tip: earn the sleeping bag from 20 hotel quests first — it makes skipping to exact times and days far less painful. You will need Surf, Cut, Strength, and Rock Smash along the way.

• Where: Saffron City bar, after the full band quest
• Level: 50
• Why it is rare: the only Pokémon gated behind real in-game calendar scheduling
• Fusion potential: Normal/Psychic with great special stats — a sleeper pick for special-attacking fusions

5. Deoxys — The Spaceship Scavenger Hunt

If you are wondering how to get Deoxys in Infinite Fusion, the answer is one of the game’s coolest side quests. It starts in the Kin Island hotel, where a girl with glasses tells you she saw a meteor crash near Bond Bridge. Investigate north of the bridge to find a waterfall, climb it, and meet two secret-agent NPCs standing around a small crater. They need your help finding pieces of an alien spaceship.

The first piece sits on Route 32 near a ledge. The second is underwater on Route 19, south of Fuchsia City — dive at the spot on Route 20 and head east to find it. Bring the pieces back to the agents near Bond Bridge, and they triangulate the mothership’s location: Birth Island. Ask the sailor in the Cinnabar Island harbor to take you there, find the last spaceship part, and interact with it. It starts floating around — interact with it twice more and Deoxys appears at level 70.

• Where: Birth Island, via the Cinnabar Island harbor sailor
• Level: 70, HMs needed: Surf, Dive, Waterfall
• Why it is rare: an unmarked scavenger hunt across three distant locations with no quest marker
• Fusion potential: Deoxys has one of the highest offensive stat totals in the game — fuse it with a bulky partner to fix its paper-thin defenses

6. Darkrai — The Nightmare Feather Chase

Darkrai’s quest is pure atmosphere — and it is missable if you do not understand the karma system. First, grab the Bedroom Key from the Goldenrod Department Store basement and use it to open the back room of the Lavender Town orphanage (the southeasternmost house). A feather on the bed triggers a cutscene, and a voice tells you to collect more feathers that only appear at night.

At night, shadowy figures appear across the regions, each hinting at the next feather’s location: the northernmost house in Vermilion City east of the Pokémon Center, the stairs of the daycare south of Cerulean City, the Fuchsia City hotel, a house on an island north of Crimson City, and back at the Lavender orphanage. Collecting the last one drops your karma by 5, so keep an eye on it — our Mew guide explains how karma works, since Mew also needs positive karma.

Then sleep in the orphanage bed to wake on Halfmoon Island. Speak to Darkrai, solve the Moonlit Forest water puzzle to reach Newmoon or Fullmoon Island, and choose your path: the Darkrai path has you place a Corrupted Feather on the Fullmoon Island bed, costing another 20 karma, before Darkrai joins your party. Take the Cresselia path instead and Cresselia joins while Darkrai becomes catchable. Either way, you need Surf or Fly to reach the islands.

• Where: Halfmoon Island → Newmoon/Fullmoon Island, via the Lavender orphanage
• Level: 50–60
• Why it is rare: night-only feathers, karma management, and a branching choice — you can only take one path per playthrough
• Fusion potential: Darkrai’s Dark typing and speed make it a nasty fusion partner for Psychic-types it normally fears

7. Celebi — The 50-Quest Reward

Celebi is Infinite Fusion’s loyalty reward: complete 50 hotel quests and the man on the top floor of hotels gives you the GS Ball. Place it in the shrine in Ilex Forest and Celebi appears at level 30. There is no trick, no shortcut, and no alternative — just fifty quests, many of which send you across both regions.

The good news is that hotel quests also unlock genuinely useful items along the way, including the sleeping bag at 20 quests (which you will want for Meloetta’s schedule, above). The bad news is that this is one of the slowest grinds in the game, and unlike Jirachi’s requirement, you cannot passively complete it by playing normally — you have to deliberately seek out the quest givers. Celebi does not respawn if you knock it out, so save before touching the shrine.

• Where: the shrine in Ilex Forest, with the GS Ball from 50 hotel quests
• Level: 30
• Why it is rare: 50 deliberate side quests is a bigger ask than it sounds
• Fusion potential: Grass/Psychic with a solid support movepool — great for defensive fusion experiments in the team builder

8. Mew — The Karma Telescope Puzzle

Mew hides in plain sight at the Mt. Moon observatory, but getting to it takes two separate grinds. First, you need 20 or more positive karma — earned by completing sidequests and making good choices (you can check your karma in Ecruteak City). Second, you must find all 8 constellations scattered through the game. Then climb to the Mt. Moon Summit with Strength, use the telescope, and steer the center dot to collide with the Mew that spawns. If you hear its cry but cannot see it, your karma is too low.

Mew shows up at level 30 and respawns after you beat the Elite Four champion again if you miss it, which keeps it slightly more forgiving than the mythicals above. Still, the combined karma-plus-constellation gate makes it one of the rarest Pokémon in Infinite Fusion for most players, and it is available before the post-game — unlike almost everything else on this list. For the full step-by-step, see how to catch Mew in Pokémon Infinite Fusion.

• Where: Mt. Moon Summit observatory telescope
• Level: 30, HMs needed: Strength
• Why it is rare: the only encounter gated behind both the karma system and a collectible hunt
• Fusion potential: Mew learns every TM and has perfectly balanced 100s across all stats — it is arguably the best fusion parent in the game

9. Diancie — The One-Shot Island Quest

Diancie is not the hardest Pokémon to earn, but it is one of the easiest to lose forever. After completing the Operation Shutdown quest, head to Goldenrod City and talk to either Archer in the tunnel/department store basement or the police officer left of the train station to start the Pinkan Island quest. Whichever side you pick, you get Diancie — it does not matter who you help.

The catch: you only get one Diancie per game, it never respawns, and the quest plays like a mini fresh start on Pinkan Island, where you rebuild from scratch with the Pokémon you have caught. You can save as long as you stay on the island, and dying just respawns you near the boat, so the quest itself is safe — but if you knock Diancie out or fail the questline (for example, by joining Team Rocket at the wrong time after Mt. Silver), that is it for this save file. Finish it, collect your level 30 Diancie, and keep every other Pokémon you catch on the island too.

• Where: Pinkan Hollow, after the Pinkan Island quest in Goldenrod City
• Level: 30
• Why it is rare: strictly one per save file, and the quest path can be locked out by story choices
• Fusion potential: Rock/Fairy with huge Defense — an excellent defensive backbone for fusions

10. Ho-Oh and Lugia — The Fused Sky Gods

Ho-Oh and Lugia do not appear separately in Infinite Fusion — they arrive fused together as Ho-Gia, and the journey to reach them is a proper adventure. On Boon Island, a resident tells you about Navel Rock; head north, find Chuck, and defeat him to earn the Navel Ticket. Show it to the sailor in the harbor and he will ferry you to Navel Rock.

Climb through the cave — ladders, bird Pokémon hopping around, a pond and waterfall to navigate — until you reach the peak and cross the thin path. Ho-Gia descends for a battle at level 60. You need Surf and Waterfall to get through the island, and the fight itself is no joke, so bring status inducers and your strongest balls. Ho-Gia respawns after repeated Elite Four victories if you fail, but the Navel Rock trek is long enough that you will want to catch it first try. Our legendary locations guide covers every other static legendary encounter.

• Where: Navel Rock peak, via the Boon Island harbor sailor with the Navel Ticket
• Level: 60, HMs needed: Surf, Waterfall
• Why it is rare: a fused encounter you cannot get anywhere else, at the end of a long island climb
• Fusion potential: a legendary fusion of two legendaries — defusing Ho-Gia in the fusion calculator theory-craft is half the fun

Honorable Mentions: Rare Pokémon That Are Easier to Catch

These did not make the top 10, but they still deserve a mention — either because the encounter is genuinely tricky or because players ask about them constantly.

• Latias and Latios: after interacting with the TV in the Boon Island Pokémon Center, two Latias/Latios fusions start roaming the Sevii Islands at level 50. Track them with the Weather Tracker from the Ruins of Alph — they cause strong winds wherever they are. They never respawn, so catch them carefully.
• Regigigas and the Regi trio: the Submerged Temple (via Dive from the Water Labyrinth near Chrono Island) hides three doors that each need a Steel/Rock, Rock/Ice, or Ice/Steel Pokémon to open, plus a Sharpedo chase while pushing boulders. Catch all three Regis to open the path to Regigigas at level 60.
• Rayquaza: locked behind both Groudon and Kyogre encounters — talk to the resident on Kin Island afterwards for a ride to Sky Pillar, then climb to the top for a level 70 fight. No Bicycle required, unlike the originals.
• Mewtwo: the classic. After beating the game, Professor Oak sends you to Professor Elm in New Bark Town; with at least 2 Johto badges he hands over HM05 Waterfall, which opens Cerulean Cave. Mewtwo waits at the very end at level 60. Full details in our Mewtwo guide.
• Raicune (Raikou/Suicune fusion): follow Eusine from Violet City to the Ruins of Alph basement, watch it flee, then chase it as a Johto roamer at level 50 using the Weather Tracker.

Tips for Hunting Rare Pokémon in Infinite Fusion

• Save before every one-time encounter. Celebi, Jirachi, Meloetta, Diancie, Arceus, and Deoxys do not respawn. If you knock one out, your only options are a new game, Wonder Trade, or the Celadon City Black Market. Saving takes five seconds; regret lasts a whole playthrough.
• Use your Master Ball on roamers, not statics. Roaming Pokémon like Latias/Latios and Raicune flee on the first turn. Static encounters can be reset and retried; roamers cannot. The maid on Resort Gorgeous gives repeatable Master Balls for showing her new fusions.
• Watch your karma early. Mew needs 20+ positive karma and Darkrai’s quest drains it. Check your karma in Ecruteak City, and farm it by completing sidequests — the lumberjack with the Scyther in Ilex Forest gives +3 karma each time you help him and is repeatable.
• Get the Weather Tracker. A scientist in the Ruins of Alph gives you this item, and it is essential for tracking every roaming Pokémon in the game — Raicune causes storms, Entei causes sunny weather, and the Latias/Latios fusions cause strong winds.
• Stack HMs before post-game. Surf, Dive, Waterfall, Strength, Rock Climb, Flash, Cut, and Rock Smash all gate at least one rare encounter. Keep a dedicated HM user in your PC box so you are never stuck.
• Level past the encounter. Most rare encounters sit between level 50 and 75. A level 80+ team with False Swipe and a sleep inducer turns scary fights into routine catches — plan yours in the team builder.
• Shiny hunters, take note: rare encounters can be shiny, and the odds make these the ultimate trophies. Read our shiny hunting guide before you start resetting.

Rarest Pokémon in Infinite Fusion: FAQ

What is the rarest Pokémon in Pokémon Infinite Fusion?

Jirachi. It requires 777 unique non-legendary Pokémon registered in your Pokédex before the hotel-dream event unlocks — the single biggest completion grind in the game. Arceus is a close second, gated behind six other legendary catches and the Azure Flute quest chain.

Do rare and legendary Pokémon respawn if I knock them out?

Some do, some do not. Pokémon like Mew, Mewtwo, Rayquaza, Kyogre, Groudon, Darkrai, Cresselia, and Necrozma respawn after you defeat the Elite Four champion again (if you defeated or fled rather than catching them). But Celebi, Jirachi, Meloetta, Diancie, Arceus, Deoxys, and the roaming Latias/Latios fusions never respawn — miss them and you need a new game, Wonder Trade, or the Celadon City Black Market.

Can I catch these rare Pokémon before beating the game?

Mostly no. The Kanto legendary birds, Entei, Mew, Jirachi, Meloetta, Cresselia, Darkrai, and Diancie are obtainable outside the post-game; everything else on this list requires beating the Elite Four first. Mew is the most accessible of the bunch, available as soon as you reach Mt. Moon with enough karma.

Which rare Pokémon are permanently missable?

Any one-time mythical you knock out without saving: Celebi, Jirachi, Meloetta, Diancie, Arceus, and Deoxys. Diancie’s quest can also be locked out by story choices, and Darkrai’s path forces a permanent choice between Darkrai and Cresselia joining your party. When in doubt, save first.

Can you fuse rare and legendary Pokémon?

Yes — every Pokémon in the game can be fused, including mythicals and legendaries. Fusing a rare Pokémon is a one-way showcase of your achievement, so preview the result in the fusion calculator first. Note that fused Pokémon without your Trainer ID cannot be unfused until the post-game.

What is the best Poké Ball for catching rare Pokémon?

Save Master Balls for roamers that flee (Raicune, Latias/Latios fusions). For static encounters, weaken to red HP, inflict sleep, and throw Ultra Balls or Dusk Balls at night. Stock up before long quest chains so you never have to leave mid-hunt.

Final Checklist: Catching the Rarest Pokémon in Infinite Fusion

The rarest Pokémon in Infinite Fusion are not rare because of low encounter rates — they are rare because the game makes you earn them through quests, karma, calendars, and sheer Pokédex completion. Start early: build karma, do hotel quests, and register everything you see. Save before every one-time encounter, track roamers with the Weather Tracker, and keep a Master Ball in reserve for the ones that run. Do that, and even Jirachi is just a matter of time. Good luck out there, trainer.