Rex Freakasaur is a dinosaur-like bakugan that is the evolution of Thunder Freakasaur. (NOTE: He already evolved from Thunder Freakasaur by the time the series started.
He first came from a shooting star that crashed on the planet Thundonia, and he was found by Rex Brawler87. He became his guardian bakugan.
Powers and Weaknesses
1 has the abilty to control thunder
3 has very strong shields
2 acid and lava