King Mondo sent Klank to set up an ambush and to destroy the Angel Grove University warehouse if the Rangers got too close to spare fuel cells. Mechanizer attacked Tommy when he split up from the others to find the fuel cell. Mechanizer torched the warehouse by blasting several containers of explosive liquid.
He later received the Neo-Plutonium Armor from King Mondo and was later sent to Earth to fight the Rangers as a giant. He ended up getting destroyed by Super Zeozords 1 and 2.