Serebii says this on MD3:
The accuracy on this game leaves something to be desired.
Munna has Hypnosis. It ALWAYS hits. Even though you have items that can
awaken you, you can't access them if asleep, allowing them to chain kill
Great. There goes any balance the game might've had. All this after they put a lot of effort into balancing MD2.
Also, unlike what the pre-release screenshots implied, you can only evolve in the post-game. Again. So the one excuse they might've had for giving us only five starters doesn't even work. You know what? I think I might pass on this game.