The Quantasaurus Rex's normal mode. In this form, its main weapon are the Q-Rex Lasers built on its back and another powerful laser blast fired from its mouth. The Quantum Ranger would often leap onto the head of the Quantasaurus Rex to fire his Quantum Defender in combination with its lasers and the Time Force Megazord in Mode Red would ride on its back to defeat monsters.
The Quantasaurus Rex's alternate combat mode, which it transforms into upon the Quantum Ranger's voice command. In this form, its back lasers are replaced by a set of cryo blasters on its shoulders, which use the Max Blizzard attack to finish monsters. The Q-Rex can also use the Quantum Thunder Fist attack, where it launches its left fist at the opponent and its right hand is a revolving missile battery called the Quantum Missile gauntlet.