Rom 1636 Pokemon Fire Red Squirrels -

An Exploration of ROM Hacking and Pokémon Fire Red: The Squirrels of 1636

But 1636? 1636 was safe. 1636 was the ROM that worked with the GameShark codes everyone copy-pasted from GeoCities websites. It was the version that allowed you to walk through walls, catch Mewtwo in Route 1, and replace your starter with a Level 5 Charizard with maxed-out IVs. It was the foundation upon which millions of corrupted childhoods were built. Rom 1636 Pokemon Fire Red Squirrels

So why would a Fire Red hack reference squirrels? An Exploration of ROM Hacking and Pokémon Fire