This Pokemon is immune to sound-based moves, including Heal Bell.
Pokémon with Soundproof
Mr. Mime
Exploud
Mime Jr.
Electrode
Voltorb
Whismur
LoudredSoundproof
HeartGold & SoulSilver
HeartGold & SoulSilverShowing HeartGold & SoulSilver. Items may require trading, an event, or downloadable content.
Mr. MimeExploudMime Jr.ElectrodeVoltorbWhismurLoudredSources: PokéAPI, PKHeX game records, Pokémon Showdown and Serebii.