Space Dog is Space Boy's sidekick and a fan of Olie, Billy, Zowie, Spot and Pollie. He resembles Spot, but he and Space Boy are blue and silver instead of yellow and brown. His vocal effects are done by Robert Smith who later voiced Goliath from JoJo's Circus.
Space Dog is adventurous, kind, helpful, and brave like Space Boy. He helps to save the day with Space Boy.
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