A Kilwala is an enemy monster found in 65,000,000 B.C. in Chrono Trigger.
Crono and his party encounter Kilwalas while traveling through the Mystic Mountains when they first arrive in the Prehistoric era.
Crono also encounters Kilwalas in the Forest Maze and again on their way back through the Mystic Mountains.
After returning from their first visit to 12,000 B.C., Crono's party encounters more Kilwalas on their way through the Mystic Mountains.
The magical creature Spekkio from The End of Time appears as a Kilwala when Crono meets him for the first time if all party members are below Level 10.