- "More than anything, it lives to terrify people. It sometimes startles itself and bursts into laughter."
- — Battle Memory
|Vulnerable to||PK Freeze, PK Fire, Paralysis, Bombs|
|Location||King P's room in Thunder Tower|
The Surprise Box is an enemy encountered in Mother 3 that can only be fought once in King P's room in the Thunder Tower. Before Lucas and co. interact with it, it appears to be an immobile Gift box similar to the other two in the room. However, when it is provoked, it pops out of the box and initiates battle. It can only be battled once, after which there is simply an empty space where the Surprise Box once was. It can only be seen in-battle from the front, and its back sprite exists in the coding of Mother 3 but is unused in-game.