In this tournament, paired players will take turns locking and banning formats.
For instance, let’s say we have Aqua vs Chiori Mikami listed as one of the matchups.
To kick things off, Aqua decides to lock Gen 8 Hackmons Cup. Next, Chiori Mikami decides to lock Gen 8 Doubles Hackmons Cup. Following that, Chiori Mikami will ban Gen 7 Hackmons Cup. Finally, Aqua will ban Gen 8 Hackmons Cup (one vs one).
As a result, the series will begin between Aqua and Chiori Mikami in the one unchosen format Gen 1 Hackmons Cup (OnevsOne) Bo3.
Whoever loses in the first game will subsequently play against their opponent in the format that they have locked. If the game one defeated player ties the second game, the final game will be the format chosen by the winner of the first game.