What level should I be in Pokemon Mystery Dungeon DX?
1: Recommended Level for the Sky Tower is 30
Although Dungeons do not have an outright recommended level, it’s better to have your Pokemon at Level 30 before heading in. This will ensure that you can survive against the enemies you find inside.
What are the max stats in Pokemon Mystery Dungeon DX?
Base Stats
Non-HP stats can be raised to a maximum of 255; HP can be raised to at most 999 according to Bulbapedia!