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The Hanna-Barbera New Cartoon Series: Season 1, Episode 133 - Gladiator Gator (1963)
Released: July 8, 1963
Wally takes a turn at joining the circus, only to find out that he's destined for a fight with a boxing kangaroo. Killer Kangaroo's previous opponents, a "ferocious" tiger, lion and ape, have been crossed off the fight card.
