Pizza Boxes are white rectangular cardboard boxes.
Enemy Spawners are hard purple rectangular boxes with a little dent on their front and a brown sign showing a skull planted on their top.
An Enemy Spawner infinitely spawns a certain enemy, projectile, or shotgun, only spawning more once the spawned entity has been defeated or destroyed. Enemies spawned from an Enemy Spawner do not give points or count towards a combo. On occasion, these are used for puzzles, so that the player can attempt them more than once.
- Purple variants of the Trash Pan similar in behaviour and physical design to the Enemy Spawner can be found that infinitely spawn cheeseballs.
- There's an unused aggressive red version, which would have likely spawned enemies much faster or spawn more than one enemy at a time.