I once saw a video about a game (pretty sure it was a 2D platformer) where you could find a certain food (it may have been garlic but I'm not sure) pretty early in the game and when you carried it to the last boss (which was quite a hassle) you could instantly defeat the boss because they were allergic to the food. Does anyone know what game that is? I couldn't find it online.

Edit 1: I just found it on YouTube, it's Spelunky where you can defeat the boss with an eggplant. Found in this video:

Edit 2: Seems like it has nothing to do with allergy? It just turns the boss into an eggplant?

late reply but yes someone managed to bring the egg plant to the final boss and so the devs made it an easter egg (to my believe it went like this)