When Tommy arrived at Angel Grove High, Rita saw him as the perfect person to become her evil Green Ranger. She put him under a spell and gave him the Dragon Power Coin. With it, Tommy morphed into the Green Ranger and fought the Power Rangers, defeating them in a couple of battles. Tommy was given the Sword of Darkness to finish off the Rangers, but Jason defeated Green Ranger in combat and destroyed the Sword of Darkness, releasing the spell over Tommy, making him the newest Power Ranger. Green Ranger's power weapon is the Dragon Dagger, which doubles as a flute and plays music to summon the Dragonzord. As Green Ranger, Tommy gained enhanced strength, speed, and durablity as well as limited energy projection. Green Ranger also wore a special shield around his chest which protected him from many attacks. Tommy is a bit forgetful and dim witted at times, but he more than makes up for it with his nobility and courage. Tommy eventually lost his powers after Rita created a Green Candle that took his powers away as it burned down. After losing their Power Coins, the Rangers called on Tommy to once again become the Green Ranger by using the Dragon Coin and Zordon's energy. The powers were only temporary, and Tommy once again lost his powers as Green Ranger.
Tommy would later be given new powers by Zordon, making him the White Ranger. After losing these powers to Lord Zedd and Rita, he used the Zeo Crystal to become the Red Zeo Ranger. Another power upgrade later made him the Red Turbo Ranger, powers which he eventually passed on to a successor, TJ. Tommy returned years later as the Red Zeo Ranger to lead 9 other Red Rangers on a mission to prevent the Machine Empire from using Serpentera to destroy Earth.