The Super Power Union, also known as S.P.U., is a union for superheroes. Its president is Ulti-Man.
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Heroes who are members of the Super Power Union are called Super Power Union Delegates, S.P.U.D. in short.
Disney Adventures comics
Darkwing Duck notes that he's at risk of losing his membership in the super heroes union if he doesn't foil Pokerface's scheme. The Super Power Union comes to St. Canard on initiaive of Mister Wonderful.