Box Spring

A Box Spring containing a Yellow Spring from Mario vs. Donkey Kong: Minis March Again!.
A Box Spring containing a Blue Spring from Mario vs. Donkey Kong: Minis March Again!.

Box Springs are objects that appear in Mario vs. Donkey Kong: Minis March Again!, being introduced in Room 2-5 of Sandstone Stroll. They are contained in flashing green boxes found on the ground. When the player taps a Box Spring on the touchscreen, it briefly releases either a Yellow Spring or a Blue Spring, as indicated on the front of the box. If a Mini is directly above a Box Spring when it is activated, the Mini is launched into the air using the spring, either in an upward arc by a Yellow Spring or in a forward arc by a Blue Spring.