Mass Manipulation – The ability to increase or decrease mass in an object. Mass Manipulation is also known as Mass Alteration, Mass Control and Mass Shifting.
Literary Critique of Mass Manipulation
Harry Leland (Marvel) is a supervillain that may be portly but he can take on Wolverine (Uncanny X-Men V1 #132).
Kono (DC) has the power to shift mass through time, thereby making objects more or less dense. (Who’s Who in the DC Universe #1).
Iron Man (Marvel) gives the seemingly invincible and already massive Crusher even more mass so that he plummets to the core of the Earth in Tales of Suspense #91.
“Jimmy Olsen Heavyweight Champ” – Superman’s Pal #88