max% Games
Above and beyond getting 100% in a game, it's typically not seen by the game developers eyes as "normal" to go this far. Since max% can mean many different things and is really open to interpretation, I'm leaving notes on why I would consider what I did in the game to count as max%
5 Games
Solved every single puzzle (523, +135, +6 Save File)
Completed all of the Mail quests, got every single hat!
Complete every level with Random Shapes
Besides getting 999 moons, I also got all 50 Stars in Luigi's Balloon World, as well as maxing out counters for no reason (Like getting 99 moons in every single shop)
I obtained every single Lantern in the game, including the DLC. So beating every level with more than 100% accuracy and also completing every single speed trial