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Benjamin "Ben" Kirby Tennyson, commonly known as Ben 10, is a fictional superhero and title protagonist of the Ben 10 franchise.
Ben Tennyson
X-Men
for X-Men in If this Character was in...
Suggested by tomzillawash3r3
Vote which fictional character would naturally fit in-universe with a big-named franchise! No time-travel, no interdimensional crap, no "Pooh's Adventures", they would just exist in-universe.
