Bowser was not a supervillain that often made use of psychological tricks, just pure brute force. Video games, usually, were no different.

"Uh, sure." Bowser goes to one of the consoles, and starts the game. There is a chance to show off his skill, after all.

When he does, he demonstrates that, despite his non-human physique, he is actually quite skilled at the game. The combos are nearly perfect, but even so, his performance is worse than his personal best so far.