256x item selling price glitch | Amazing Trainers | Berry glitch | Draining hitpoints animation glitch | Evolution animation glitch | Sticky Hold glitch | Mossdeep City Skitty glitch | Truck glitch | Nightmare glitch | Mossdeep City Skitty glitch
Acro Bike instability glitches (Japanese only) | Dark red selector glitch (International only) | Excessive doll arrangement glitch (Japanese only) | Mail and Trick glitches (Japanese only) | Surf on land (Japanese only)
Exclusive to FireRed and LeafGreen:
Celadon City origin glitch | Pokédex species glitch | Roaming Pokémon Roar glitch
Exclusive to Emerald:
Battle Pike poison knockout glitch | Black curtains glitch | Mart worker glitch | Mover Vigoroth cry glitch (Japanese only)
In various or all entries:
Azurill gender glitch | Boss HP recruit glitch (Mystery Dungeon) | Decamark-specific glitches | Dewford Gym footprint glitch | Evolution move-learning glitch | Focus Punch glitch | Roaming Pokémon IV glitch | Sky Pillar glitch | Thunderbolt glitch | VBlank RNG interrupt glitch
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The Celadon City origin glitch is a natural glitch in Pokémon FireRed and LeafGreen.
SummaryPokémon obtained with the "CELADON CITY" origin (including Eevee, Game Corner Pokémon and hatched Eggs) will have their origin changed to "CELADON DEPT." upon entering any room of the Celadon Department Store.
The same applies the other way around; Eggs hatched in the Celadon Department Store will have their origin changed from "CELADON DEPT." to "CELADON CITY" upon exiting the department store.
The reason for this is unknown.