The Size Changer is a weapon from Dansu! De Jump! Na Daibouken. It was created by N. Gin for Dr. Cortex's use. Cortex shrunk Crash with it for his own amusement, then got salt thrown in his eyes, and accidentally ate Crash. Crash then escaped through Cortex's nose while he was sleeping.
The Size Changer can drastically shrink or enlarge any object hit by its ray. After hit multiple times the victim becomes either microscopic or extremely large. The affected object can also be changed back to its original size with a change of settings. There is a dial on the side of the weapon used to set the strength of the ray.