King Hippo hails from the Punch-Out series as a villian, appearing in his title defense form as his main form. Not only does he count as a revived retro villian and a first party character, he also has his own style of the Heavy Character moveset.
B. Manhole Block: Hippo uses his Manhole covered stomach to block his opponents attacks and damage them.
<-B-> Crush Thump: His two handed, overhead punch from Punch-Out Wii.
B ^ Grunt Upper: Hippo shudders and throws his fist into the air bringing him upwards. (About as high as Bowser's normal jump.)
B V Hippo Stomp: Think of a sumo stomping, and add some tremors.
Final Smash: Hippo Rage