In many "Fakemon" hacks (games featuring fan-created Pokémon), creators often fill the early-game "rodent" niche with squirrel-inspired creatures. While the official games have Pachirisu and Greedent, FireRed modders often create their own custom sprites to give players a fresh experience. If you are searching for a FireRed squirrel, you are likely looking for a specific fan-made version of the game that replaces Rattata or Pidgey with a custom squirrel-type monster. Official "Squirrel-Like" Pokémon in FireRed
The rules: no evolving Pikachu into Raichu (keeps the “squirrel” identity), and no using reptilian or bird Pokémon. The run ends at the Pokémon League.
In official FireRed games, there is no wild Pokémon or NPC explicitly called “Squirrel.” However, fans often use the term affectionately for:
1 PLAYER POKÉMON FIRE RED VERSION (SQUIRRELS)