From the Super Mario Wiki
Classic Clash (originally known as Classic Clash III) is one of Dribble and Spitz's microgames in the Sci-Fi folder in WarioWare, Inc.: Mega Microgame$! It is also one of their microgames in WarioWare Gold.
The player must input a sequence using the only that appears above Nintenman's head to charge and fire a beam of energy at the Bowser-like enemy, seemingly vaporizing him. The beam has to hit the monster or else the microgame is lost, even if all inputs were pressed. In WarioWare Gold, the monster is remade to resemble a high-definition version of Bowser's sprite from the original Super Mario Bros.
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