Parallel World - JoJo's Bizarre Encyclopedia

Parallel Worlds (並行世界, Heikō Sekai), also referred to as Worlds Next Door (隣りの世界, Tonari no Sekai), Other Dimensions (異次元, Ijigen), or Alternate Universes, are physical dimensions that co-exist and operate independently of each other. The existence of such worlds plays a major role in Steel Ball Run as the basis behind Funny Valentine's Stand, Dirty Deeds Done Dirt Cheap.

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