Buhamut

Buhamut is the king of dragons. Johnny Thunder summons him to help fight Sam Grant and the gang in the season finale. Buhamut fights the Giant Robot with a Bird-Like Head piloted by Dr Decapsule, Harry Kane and Louie. Buhamut destroys the Giant Robot by biting its head off but is sucked through the dimension portal thanks to Ace Grant, it is unknown what happened to Buhamut afterwards or which dimension he currently resides in.