If you meant in Fire Red :
If this is for a video challenge run:
In FireRed , Squirtle is a highly reliable choice because its Water typing and strong defenses make it effective against the first Gym Leader, Brock. The "FireRed Squirrels" ROM squirrels pokemon fire red
While Squirtle is canonically the "Tiny Turtle Pokémon," its name is a portmanteau of squirt and turtle , but many fans associate its curly, bushy tail with that of a squirrel. If you meant in Fire Red : If
I notice you're asking about in Pokémon Fire Red — but there are no Pokémon actually named "Squirrel" in the game. If you are looking for squirrel-like Pokémon available
If you are looking for squirrel-like Pokémon available in Fire Red, here is a draft for a guide:
(Gen 2, not in Fire Red without trading/postgame) – The actual “squirrel-like” normal types, but not in the main Kanto Pokédex (#001–151) except through National Dex after beating the Elite Four.