Bizhawk has worked well for me, so I would recommend going with that.

The Switch Port is a good "official" alternative if you have a capture card on hand.

I hope you decide to still give this game a go. Good luck!

Okay, I figured it out.

First, the 4 player tournament needs to be activated by acquiring any S-rank card that is available from it. (Shadow is probably the easiest of them to get.) Then beat the 4 players in a row.

The 20 player gauntlet is available immediately afterwards.

It's definitely going to be a harder speedrun than any part of the main game. The good news is the early-mid game opponents are pretty easy to beat at this point of the game. The bad news is everybody from the semi-finals and finals are here in addition to mask, and those are all lose-able matchups if you lose the coinflip and they have a powerful hand.

That being said, this is still far from a marathon of a run and could probably be completed in 2 to 2.5 hours assuming no losses during the gauntlet.

Hello all,

I have some interest in doing a post-game run but after some brief scouring of the internet, I have not figured out the exact conditions for unlocking the final gauntlet. Does anybody (namely JakatoXtra, since I don't know if anyone else is even active lol) have a clue?