If this is the case, you are looking for .
While no major mainstream hack is titled Fire Red Squirrels , several small-scale projects and proof-of-concepts exist: fire red rom squirrels
More advanced hacks add squirrel sprites that run up trees when the player approaches, similar to the wild Pokémon rustling in Fire Red ’s Safari Zone. This requires scripting movement and collision detection. If this is the case, you are looking for