Waluigi Club
Most mods install on top of a fresh copy of DDLC, free from ddlc.moe. Follow the author's instructions, and keep a clean copy of the game.
About this mod
The club dresses up as Mario characters for the annual Halloween party, but Yuri, dressed up as Waluigi, has another goal for the day.
Full credits
Crimfinity, Wilinisian, Various Artists