How did Alternia end up with so many things from Earth (for example the Crosbytop)? I'd thought they were the same planet, but that doesn't seem realistic given that everything I can remember being there was in the kids' SBURB session. If it's not Earth, what is it and how did it get to universe A? I'm confused and I hope you wouldn't mind clarifying.

Bec Noir threw things at Aradiabots, some of which were knocked threw Skaian Defense portals back to Alternia