Sprocket wasn't always this energetic. He used to be a regular, sleepy street cat who liked to nap in warm places. One chilly afternoon, he snuck into the open window of Dr. Bramble’s workshop and curled up inside a strange, glowing machine for a nap.
When Dr. Bramble pulled a giant lever to test his latest invention—the "Hypno-Energy Generator"—the machine zapped the workshop with a flash of green lightning. Instead of exploding, the machine popped open, and out jumped Sprocket!