I believe it’s actually an oversized red cartridge that has some distortion over it (thus the “meaty” texture). I remember these carts, but not this specific one. It could be a game with a rumble or an accelerometer (like WarioWare Shake or Move whichever had the weird cart), might also be a cheat device like a game genie or game shark. I vaguely recall a third name in that race in the old days, and that might have been this red cart. I can’t find pictures now given the vague info I have (just endless photos of Pokémon Red carts.)