G-Max Drum Solo inflicts damage, ignoring all ignorable Abilities during the execution of that move. (Ignorable Abilities are most Abilities that could potentially negatively affect the success, damage, or effects of a move if possessed by the target of a move or its allies—such as Multiscale and Friend Guard.)
Whether it is a special or physical move depends on the move it is based on. Unlike most other G-Max Moves, its power is 160 regardless of the base move.