Box in the Smash Bros. series could refer to:
- Box (Stage) - a special type of stage that can be made using the Stage Builder
- Cardboard Box - Snake's taunt and trademark box
- Cardboard Box Glitch - a glitch associated with the Cardboard Box
- Crate - an item in Super Smash Bros., Melee and Brawl which is a box that can be broken open to produce other items
- Rolling Crate - an item unique to Brawl which is virtually identical to the Crate, but with wheels on it, so it rolls when thrown or attacked
- Metal Box, an item in Melee and Brawl
- Blast Box, a heavy item in Brawl
- Hungrybox, a professional Melee and Brawl player