Pokémon Mystery Dungeon: Blue Rescue Team Tips

Easy level up in lvl 1 areas
For the level 1 areas (except purity forest) take a few joy seeds with you and level your pokemon up normally then when the EXP points to the next level get to high use the joy seeds to level your pokemon up. The best pokemon for these type of dungeons is charizard and mewtwo as they level up quickly.