MIPS is a Yellow Rabbit found in the Castle Basement when the player has collected fifteen Power Star. MIPS will actively attempt to flee when Mario approaches him. If Mario catches MIPS, he will give Mario a star. MIPS appears in the basement a second time after Mario has collected fifty Stars. Mario can catch MIPS again and will get another Star from him. After getting the last Star, MIPS will not reappear for the rest of the game. MIPS was used extensively in early Nintendo 64 test simulations. Mario was originally going to be able to throw MIPS, but this was removed.