Pee-wee's Big Adventure (1985)

The cartoonish and childish character Pee-wee Herman goes on a big adventure for the first time ever when his beloved shiny new bicycle is stolen by his nemesis Francis Buxton, a fellow man-child and neighborhood rich "kid." And he sets off on an obsessive cross-country journey, determined to recover it. Pee-wee's awkward and childish attempts to be cool and mature.