Here you will find a step by step guide on how to beat Pokémon XD.
Facts:
1) The plus sign is indeed an indication for shadow pokemon
2) You can now save at any point in the game just like in the GBA games
3) Your sister Mana, has a Plusle and a Minun that are overworld pokemon
4) Purification is basically via the same mechanisms as before
This Walkthrough is very text intensive
