On some missions a screen comes up at thwe start of the level allowing you to choose your team(s) of two i think the first one is on gorilla city.
Watch out though on one level you have to choose three teams and i tell you leave the best heroes for the thrd team.
I tried using The Flash and Aquaman (What A Mistake!)

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Is the Justice League of Heroes Available on Gamecube?

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My children love Justice League Unlimited especially Wonderwoman and Hawk Girl, hope DC would consider making a movie, I’m sure kids all over the world would be very delighted, even grown ups too..The script is also very impressive.

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