KAOS is first encountered by Dixie Kong and her cousin Kiddy Kong while venturing through the factory-covered island, Mekanos. Entering a factory titled KAOS Karnage, the Kongs watched as KAOS descended downward upon them. Immediately identifying the Kongs as a threat, KAOS engaged them in battle. Attempting to roast the Kongs with his exhaust flames, this ploy failed as the Kongs could simply weave and run underneath the mechanical monstrosity. KAOS is later found in Kastle KAOS, where he easily gets defeated by the Kongs, revealing the real Kremling master, Baron K. Roolenstein.
- It's rumored that KAOS's name stands for Kongs At Our Service. However, this has not been officially confirmed.