A Two-Pipe Puzzle is a Side Quest in Mario + Rabbids Sparks of Hope, specifically in the The Last Spark Hunter DLC. It is found on the Melodic Gardens.
While the heroes are traveling by boat in the Swamp, they can find a side path that leads to a puzzle involving giant movable blocks and pipes. The Giant blocks are moved by Beep-0's Wave Power. The heroes must move a smaller block onto two separate switches to unlock either another pipe or a cannon. The goal is to make a large rectangular block create a bridge as to allow a path to the cannon once that is activated. Using the cannon, the heroes can get on top of the Giant movable block to unload a ladder, allowing them to reach to the treasure chest. After the heroes open up the treasure chest, the quest is complete, and the heroes are awarded a Planet Coin.
Names in other languages
||Enigma a doppio tubo
||Double pipe enigma