Lvl 1: Leech Seed (Grass, Status)
Lvl 1: Confusion (Psychic, Special)
Lvl 1: Recover (Normal, Status
Lvl 1: Heal Bell (Normal, Status)
Lvl 10: Safeguard (Normal, Status)
Lvl 19: Magical Leaf (Grass, Special)
Lvl 28: AncientPower (Rock, Special)
Lvl 37: Baton Pass (Normal, Status)
Lvl 46: Natural Gift (Normal, Physical)
Lvl 55: Heal Block (Psychic, Status)
Lvl 64: Future Sight (Psychic, Special)
Lvl 73: Healing Wish (Psychic, Status)
Lvl 82: Leaf Storm (Grass, Special)
Lvl 91: Perish Song (Normal, Status)
Chat with our AI personalities
Feraligatr learns the moves double head hit, sonic boom boom and slap attack with lightening.
I'm afraid you cannot get a Celebi in Pokemon HeartGold, unless you use a Action Replay. The only Celebi legal, I think, is the Nintendo Event that has passed. If you do have the Celebi in your GameBoy Pokemon Cartridge, then you can migrate it to Pal Park, then trade from Pearl/Diamond to HeartGold/SoulSilver.
Get the celebi event.
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You cannot catch Celebi unless you are using cheat codes or waiting for Pokemon events.