Like the past games in the series, "Super Smash Bros." involves characters from Nintendo series fighting against each other, with the object of knocking opponents off of the stage in some way. Characters from past "Super Smash Bros." games that are in these games include Mario, Luigi, Bowser, Princess Peach, Yoshi, Link, Princess Zelda, Sheik, , Fox McCloud, Kirby, King Dedede, Pikachu, Lucario, Charizard, Donkey Kong, Diddy Kong, Samus Aran, Zero Suit Samus, Marth, Ike, Pit, Sonic the Hedgehog, and Olimar. There are six new characters: Villager from the "Animal Crossing" series, Mega Man from the "Mega Man" series, the "Wii Fit" Trainer, Rosalina from the "Mario" series., Little Mac from the "Punch-Out!!" series, Greninja from the "Pokémon" series, the Mii, Palutena from the "Kid Icarus" series, and Pac-Man from the "Pac-Man" series. There are also many hidden characters to be unlocked dubbed "Secret Characters" by the official Super Smash Bros. Website.