I completed the game twice already, but I don't like how your final team has to be your team that you won the last run with.
In the picture I attached, the final boss ends up having "apply snow," "smackback," and "resist snow," and I can't ever think of any teams in the game that could win that battle nor is there an option in the game to have the original final boss stay the same and just rotate between a selection of 3 regular bosses instead.
Just sharing how I don't like to keep deleting save files just because I get some boss that I don't think and lose out on whatever time I poured into the current save file just to get a boss I can no longer defeat at that point in the save file.