Probably the biggest addition to Patapon 2 is multiplayer. Once you unlock your Hero character you are able to join 3 friends via Ad-Hoc in a co-op mode where instead of commanding your squad you control your hero.
The mission is to transport a magical egg to the end of a level, and then hatching it by completing a minigame.You acquire eggs from bosses and some missions. You can then play these with your hero character and unlock upgrades for your hero. After each mission is a rhythm mini-game that involves hitting the correct beat for Ka-ching.
The better your score the better the reward will be when the egg hatches. The big rewards are masks for your hero. There are 4 per egg to acquire. If you don’t happen to have 3 friends you can play all these missions by yourself with the aid of 3 AI heroes. You can also acquire new heroes to help you by playing the missions.
Acquiring newer masks for your hero will aid you in the story mode by allowing you to use them.
All in all, a great improvement to the original, thiough the GR reviewers beg to differ