... turns into an adult in the process (but can go back to his/her normal age any time)? The only ones I can think of are POWER RANGERS TURBO (and therefore, TURBO: A POWER RANGERS MOVIE) and both BEETLEBORGS shows.
shareShazam is coming out in a couple of years and that's his basic situation.
There's always free cheddar in the mousetrap
Yeah, Captain Marvel from the Shazam franchise has always been what you described, and he's one of my favorites. Also, wasn't Prime like that too?
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"Trust me, Clark. Our friendship is going to be the stuff of legends." Lex Luthor
I don't know who PRIME is.