Pingu stars as a boss battle in "Beat up the people who you love" mode. You could unlock him by playing as his mother.
Boss acts Edit
Pingu usually says "Nug! Nug!" and uses his beak as a weapon. His special attack is rolling up into a ball and hitting everybody.
How to unlock Edit
You have to play as Pingu's mother. First of all, you need to use the Konami code twice, tell the secret recipe to the Krabby Patty Formula aloud, and then sing "Big Baby Buns", in order to spank him.
Final Smash Edit
Pingu's final smash is summoning ice sculptures that look like monsters. They will scare everybody, and then kill them.