Boom Boom is a boss canidate for SSB4 with his theme being a remix of the Tower Boss theme from New Super Mario Bros. Wii. He is fought by Mario and Sonic. He is a heavy koopa that can't go into his shell and can't be hurt while he's down, making him an intersting boss.
Being the first boss in SSB4, his attacks are pretty simple. First he thrashes his arms up and down while he runs around the stage. The second attack is jumping up and spinning downard. His third and final strategy is the last two attacks added with a stunning ground pound move. His head is his weakspot and when he loses a third of his health meter, he falls down and can't be hurt until he gets up.