Thunder Gridman is a powerful combined form in Denkou Choujin Gridman, created when Gridman merges with Thunder Jet to gain greater speed, strength, and aerial combat abilities. As a heroic battle form, he serves as one of Gridman’s upgraded states used to confront stronger kaiju and threats from the digital world. He plays an important role in the series as a dramatic power-up that expands Gridman’s combat options and symbolizes teamwork, adaptation, and the escalation of the fight against villainous forces.