Kyle the Dark Koopa

Kyle is a Koopa who was thrown into lava by Mario, gaining the 'dark' in his name from being burnt. He and his best friend were patroling the watch tower near the Fire Sea, when Mario and Luigi attacked and defeated them, throwing them into lava. He survived, but his friend didn't. From there, he trained extensively to once again face Mario and defeat him. Kyle found his chance at revenge when he was sent to Area 64 to capture Luigi and Daisy, who were there to rescue Professor E. Gad. Unfortunately, he was defeated and his Hammer Suit was taken by Dragon. He once again tried to attack them with help of the Cult of Koopai, but was defeated again. In the end, he along with the Cult, surrendered and decided to become citizens of Toad Town. He also attended Dragon's coronation ceremony.