Ok, so, the True Lab would come after the J. Hall. Alphys' lab is NOT connected to the True Lab. The True Lab contains a Gate between the HumanSide and the OtherSide. Then you encounter a certain duo of experiments after you reach the HumanSide again... (VAIL AND RAY ARE CANON CHARACTERS IN OTHERSIDE.)
Theme - Inklo. Sprite - Dosnosii (Edits for Canon by me). Effects - Commander_Hailstorm. Inklo this is just a placeholder theme. I'll... eventually make something.
