Pokemon Mystery Dungeon: Explorers of Time / Darkness / Sky

• For the early game before you can do random/Wonder Mail Missions, don't forget your throwing items. Makes the fight against a certain criminal a LOT easier.

• Try to keep at least one High PP move on your leader. Even low power moves are still often enough to pack a whallop. Keep a Max Elixir or two available at all times and don't be afraid to use them because they're everywhere.

• When you die in a dungeon, any mons you recruited that run and are still with you at the time are lost. Similarly if the recruited mon dies and you have to reviver seeds, they're gone. However any mons sent to the guild as a result of having no room, are yours to keep regardless.

• Don't be fooled by the low accuracy, multi-hit moves, especially ranged ones like Bullet Seed, they are easily the best offensive moves in the game. Any move that provides self healing is incredibly invaluable, and speed raising moves make you practically invincible by letting you double/triple/quadruple turn your enemies. Treecko in particular can have all three and is a starter.

• When you stumble upon a monster house, step back into the hallway to take on the enemies one at a time. If you enter a floor on a Monster House, try to make for a hallway, or use moves that hit multiple targets, preferably ranged multi-hit moves or room hitting moves.

• IQ skills are not all AI tweaks. They also have some passive stat modifications among them. Your leaders IQ also affects what Tactics you can set for your allies IIRC.

• Hold onto your Gummis until Spinda's Cafe opens up, then always use them to make drinks there. You not only get the IQ boosts, but you're garunteed at least one stat boost per gummi as well, sometimes two.

• To figure out what Gummis a pokemon likes, beyond the one(s) that match its typing, look at a type matchup chart. The more damage they would take from a move of that type, the more they'll like the gummi and they'll get a bigger IQ bonus. (So a water type would love Yellow Gummis (Electric), but wouldn't be so enthused about Red ones (Fire))

• For the most part, your leader should be doing most of the work. The rest of your team is mostly cleanup crew.

• Get acquainted with the in dungeon menus. There are going to be times when you should be tweaking your allies' AI pretty much every round.