Tron is the protector of a digital realm called "The Grid". When Gumball, Darwin, Young Autobot, Grievous and Penny have been transported to the grid they were soon greeted by Tron as he was secretly excited to know that they were "users". When they met Gumball, Young Autobot, & Grievous impatiently asked where they were and what was going on. Once he told them everything Penny feeling sorry for him imidiatly offered Tron their help to defeat Clu.
Tron saw something special about Gumball, Young Autobot, & Grievous and told them that they was destined to become the "next Tron".