Ultra-Mech
From Ratchet & Clank wiki
Ultra-Mechs were huge robots created from normal size robots by Ultra-Mech Pads.
In Ratchet & Clank, Clank transformed himself to Giant Ultra-Mech Clank in order to defeat the Ultra-Mech Unlimiteds.
In Going Commando, Giant Clank fought the Thugs-4-Less Leader who controlled an Ultra-Mech.
In Up Your Arsenal, Giant Clank appears in the Secret Agent Clank Holo-Vid. Klunk also transforms into Giant Klunk, without needing an Ultra-Mech Pad, and confronts Ratchet.
In Size Matters, Giant Clank flies through space and destroys the Technomite Ships. Giant Clank also fought Otto Destruct.
In Secret Agent Clank, Giant Clank flies through the Quasar Fields in order to find Klunk.
