Hotel Mario/WMG

The picnic was just a coverup.
Once FM and GL get to the Mushroom Kingdom, they realize the truth.
 * You mean the two of us were the only ones who thought this?

All toasters do indeed toast toast.
However, toast is not all that toasters toast.
 * Toasters also play NES games.

They have a special kind of bread that goes in toasters. It's called toast.
Hence why Fat Mario says "All toasters toast toast". Another name is sourpuss bread (hence "Bowser's Sourpuss Bread"), but most people call it toast.
 * Especially in Germany, where Toastbrot (sliced bread) is abbreviated to Toast.

Gay Luigi is smitten with the player.
Hence why YOU gotta help him!