stage: Sector X - 1 (1) +1

It's based of 2D Metroid levels, since the Stage Builder doesn't have Energy Doors like in Metroid games, the energy doors are replaced with the blue things (I don't know their names) that you can walk through. It has the Multiplayer Music from Metroid Prime 2 Echos. The music fits very nicely with the stage. There is two versions of this stage, but this one is the larger version.