-Caterkiller as it looks in the fan comic "Sonic the Hedgehog: Genesis"-

Name: Caterkiller
Age: N/A
Sex: N/A
Race: Machine
Ht: 13'
Wt: 312
Background: A scavanger robot made by Dr. Robotnik. Caterkillers are usually cammanded by Scratch unless otherwise order by their master. Their purpose is to "delete" life forms from Robotnik's master factory range. Other than that, they are also used for collecting test subjects for Robotnik's experiments.