Planetoid B-1 is unlocked after obtaining Planetoid Map B-1 on Planet Montoj. Planetoid B-1 consists of two rooms. The first room only features the Landing Point. The second room features three tall shafts upward. Using the Recoil Jump obtained from Gonbei, Gaia-SOPHIA can wall jump up any of the shafts to make it to the top; however, only the right shaft, which also features spikes on its walls, allows Jason to obtain the Flash Sphere Sub-weapon, while the other paths become blocked off by bamboo gates.
When playing as Copen, the player can use G-Lola to obtain the item in the same manner. Alternatively, Copen can use his Bullit Dashes to wall jump up the middle shaft, which now has red bamboo gates and buttons that cause them to retract.