Answer 1

• Keep it in you party
• Move
• Capture the Pokemon in a Luxury Ball
• Let it hold a Soothe Bell
• Prevent fainting
• Don't use herbs (Revival Herb, Energy Root, Energy Powder)
• Use vitamins (HP ups, Protiens, Calcium, etc..)
• Give massages
• Gain levels
• Allow the Pokemon to fight in important battles (Elite Four)
• Using EV berries (Pomeg Berry, Kelpsy Berry, Qualot Berry, Hondew Berry, Grepa Berry, and Tamato Berry)

Comments

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Answer 2

Give them a Smooth Bell and walk around with them or ride you bike. Level them up and feed them lots of vitamins. Dont let them faint and level them up.