Grimer

Red / Blue: Appears in filthy areas. Thrives by sucking up polluted sludge that is pumped out of factories.

Yellow: Made of hardened sludge. It smells too putrid to touch. Even weeds won't grow in its path.

Gold: As it moves, it loses bits of its body from which new GRIMER emerge. This worsens the stench around it.

Silver / SoulSilver: Wherever GRIMER has passed, so many germs are left behind that no plants will ever grow again.

Crystal: When two of these POKéMON's bodies are combined together, new poisons are created.

Ruby: GRIMER’s sludgy and rubbery body can be forced through any opening, however small it may be. This POKéMON enters sewer pipes to drink filthy wastewater.

Sapphire: GRIMER emerged from the sludge that settled on a polluted seabed. This POKéMON loves anything filthy. It constantly leaks a horribly germ- infested fluid from all over its body.

Emerald: Born from polluted sludge in the sea, GRIMER’s favorite food is anything filthy. They feed on wastewater pumped out from factories.

FireRed: Sludge exposed to X rays from the moon transformed into GRIMER. It loves feeding on filthy things.

LeafGreen / Y: Appears in filthy areas. It thrives by sucking up polluted sludge that is pumped out of factories.

Diamond +4: It was born when sludge in a dirty stream was exposed to the moon’s X-rays. It appears among filth.

HeartGold: As it moves, it loses bits of its body, from which new GRIMER emerge. This worsens the stench around it.

Black 2 / White 2: Born from sludge, these Pokémon now gather in polluted places and increase the bacteria in their bodies.

X: Sludge exposed to X-rays from the moon transformed into Grimer. It loves feeding on filthy things.

Omega Ruby: Grimer’s sludgy and rubbery body can be forced through any opening, however small it may be. This Pokémon enters sewer pipes to drink filthy wastewater.

Alpha Sapphire: Grimer emerged from the sludge that settled on a polluted seabed. This Pokémon loves anything filthy. It constantly leaks a horribly germ-infested fluid from all over its body.

Sun: Its main source of food is the slimy industrial waste of factories. This Pokémon’s numbers have been decreasing in recent years.

Moon: It was born from sludge transformed by exposure to X-rays from the moon. When its internal load of germs decreases, it dies.

Ultra Sun: It was born from sludge on the ocean floor. In a sterile environment, the germs within its body can’t multiply, and it dies.

Ultra Moon: The wastewater coming from factories is clean these days, so Grimer have nothing to eat. They’re said to be on the verge of extinction.

Let's Go Pikachu / Let's Go Eevee: Made of congealed sludge. It smells too putrid to touch. Even weeds won’t grow in its path.