Underground Base 503

Underground 503 (aka ??????? base) is where members of the said group stay.
==Appearance==
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==Location==
The said place was connected on one of the tunnels of the ??????
==The Fan of Wiki's Trivia==
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Category:Areas
Category:The Fan of Wiki's Places/Areas
Category:The Fan of Wiki/Stuff
Category:Slush Invaders Fanon Wiki
Category:Slush Legends Series
Category:Dimensional Outcasts
Category:Fanon