Bowser is a boss battle styled character. It is A.I.-only, meaning that if it were to be selected by a human player, the A.I. would take over. The A.I. in question is built around Bowser's behavior in Super Mario World. It may be able to possibly even defeat characters with brutal A.I as the programming isn't meant to fight boss characters.
This character is controlled solely by the A.I., so no activation methods are present.
This character does not have any victory quotes, meaning it uses the screenpack's default.