Alright I'm making another WOTFI idea.

So in this one Super Smash Bros 6 comes out and the invites are sent out but the lazy ahh post office mixes up the person the invite is getting sent to and it ends up in Marios (Smg4's Mario) hands. So SMG4, SMG3, Meggy, Bob, and Boopkins go out to save him. When they arrive at the: Welcome To Super Smash Bros convention they see that Mario has taken control of all the fighters so the crew decides to fight but they end up injured and losing. But out of the shadows comes the only one who can stop Mario: Waluigi (WOTFI 2019). So in WOTFI tradition we have a banger song that gets 100M on Spotify. And in the end Mario gets his invite letter taken away and it's given to its rightful owner: Waluigi.