Giga Bowser was just Bowser but He was powered by magic from his son Bowser Jr. As Bowser Jr. Ignored Kamek’s Warning, He turned Bowser into giga Bowser, GigaBowser, In a fit Of rage, Decides to crush some buildings until he encountered Mario and The kaboom squad, which hit Bowser with bombs, When the second bombs are launched, Bowser deflects them back, Giga Bowser is like Bowser but with full anger, The same personalities as normal Bowser and Likes to destroy Mario and break buildings