Box is a gameplay element from Alex Kidd in Miracle World. Several boxes appear in the game, their content and effect varying depending on their appearance. Alex Kidd can break yellow boxes with punches.
- Yellow boxes with a star always contain Baums, either as small or big bags.
- Yellow boxes with a question mark will contain either a Power Bracelet, a Ghost, or an Alex Kidd, always in this order, but which appears first changes per area. For example, the first question box from Mt. Eternal contains a Power Bracelet, while the only question box from Lake Fathom contains an Alex Kidd.
- Yellow boxes with a skull will make Alex numb for a while.
- Pink boxes with a symbol (star, fish, waves, sun, or moon) contain a secret, which varies per area.
- Pink boxes with a skull will make a ghost appear when stepped on, so they must be avoided.