1.Put the Shadow Pokémon in your party and walk around with it.
2. Make it battle.
3. "CALL" the Pokémon during a battle when it's in "HYPER MODE" and make it "COME TO".
4. Leave it in the Daycare.
5. Use the "SCENT" item in the "COLOGNE CASE". By repeating the methods above the Pokémon will begin to become purified. The purifying process differs based on each Pokémon's nature.

Hint: Shadow Pokemon List
Hint: Shadow Pokemon List
Makuhita
Bayleef
Quilava
Croconaw
Noctowl
Flaaffy
skiploom
Quagsire
Misdreav us
Slugma
Furret
Yanma
Mantine
Remoraid
Qwilfish
Meditite
Swablu
Dunsparce
Sudow oodo
Entei
Ledian
Suicune
Gligar
Stanler
Piloswine
Sneasel
Aipom
Murkrow
Forretr ess
Vibrava
Ariados
Granbull
Raikou
Sunflora
Delibird
Heracross
Skarmory
Miltank

Absol
Houndoom
Tropius
Metagross
Tyranitar
Smeargle
Ursaring
Shuckle
Togetic