|Waluigi's Treasure Quest|
|?? ??, 2017|
| Story Mode
Moneybag's Retro Royale!
Delfino Casino Minigames
|Max. amount of players|| 2 (Story Mode)
4 (Multiplayer Mode)
As told in the story, Waluigi was cursed by King Boo, and the curse gives him the ability to transform into different forms. Transformation is the main selling point for the game. The game is a platformer, and at some points, Waluigi can transform into different forms: Jack-in-a-Box Waluigi can jump high distances and can trap enemies in his spring, Gold Waluigi can push down heavy switches but moves slower and can't jump that well, Wing Waluigi can glide and spin in the air, and Dice Waluigi can roll onto enemies and get coins based on the number he lands on. Nabbit can imitate the same things, except he can't transform. He instead uses his bag and power-ups to imitate what Waluigi does.
Besides that, the game is a 2D 16-bit platformer. You fight through 8 different worlds as Waluigi or Nabbit. There's a hub world where you can talk to citizens, including Moneybag.