Bouncing Boy has the ability to expand his body to form a sphere, which provides him with the ability to bounce off surfaces. In his normal form, Bouncing Boy is overweight, but when he "inflates", his mass and height remain the same, while his overall dimensions increase to resemble that of a human-sized ball. Whether his body actually inflates—as in, takes in air—or his individual cells expand, decreasing his overall density while increasing his overall dimensions, is not explained. When he utilizes his power, his body becomes extremely rubbery and elastic allowing him to bounce with great force. Originally thought of as a useless power by his Legionnaire peers, he has demonstrated many times that he can use his body's shape and rubber-like consistency as an effective ballistic weapon. His "go-to" move is to use surrounding walls to ricochet back and forth in order to bowl over his opponents. Unlike an inanimate rubber ball, which will slowly lose its kinetic energy due to friction and gravity, Bouncing Boy uses his muscles to maintain his velocity and power as he bounces about. His power also provides him with a limited degree of invulnerability while bouncing. He is also invulnerable to electric shock while in his spherical state.