Welderberg is an odd hairy creature in the third dimension of Flopside in Super Paper Mario. He seems to be able to flip dimensions, and make gateways through them, and is also skilled at making Warp Pipes in a few seconds. Welderberg can make a pipe from Flopside to Flipside for 300 coins, a pipe from Flopside Tower to the Flopside Pit of 100 Trials for 100 coins, and a pipe from Flipside Tower to the Flipside Pit of 100 Trials for 100 coins.