Marill

“The tip of its tail, which con­ tains oil that is lighter than wa­ ter, lets it swim without drowning.”

— Pokémon Gold

“The end of its tail serves as a buoy that keeps it from drowning, even in a vicious current.”

— Pokémon Silver

“The fur on its body naturally repels water. It can stay dry, even when it plays in the water.”

— Pokémon Crystal