omega pieces are used to open certain doors which have special programs or other stuff behind them.
you beat an omega boss in a random battle
Megaman Starforce 3
megaman starforce 1 2 and 3
No sadly since starforce 1 and 2 cannot connect, neither can starforce 3. Since there are different types of powers in each game they cannot connect to eachother.
there is talk of a new megaman for 3ds
you buy it from a shop
gamestop
June 30
you can't
There are a bundle of cheat codes available to the Megaman Starforce 3 series that can be found online. The cheats are available on GameFaqs database.
you need joker key
it was a download event
I t comes out July 30 2009