Bubble Crab was once a Maverick Hunter who served in the 6th Naval Unit along with Wheel Gator; the two had a strained working relationship and frequently argued. Being extremely avaricious, Bubble Crab's only motivation in life was to amass great wealth; he joined Sigma's Maverick rebellion purely out of greed, as he saw it as his chance to get rich quick. He was put in charge of transportation, and tasked with defending the Mavericks' deep-sea submarine base. However, X infiltrated the base and destroyed him, claiming his Bubble Splash.Font: https://megaman.fandom.com/wiki/Bubble_Crab