Pokémon/Pokédex/Smoochum

TM/HM

 * GS/C/RS/FL: Attract, Blizzard, Double Team, Frustration, Hidden Power, Protect, Psychic, Rain Dance, Rest, Return, Shadow Ball, Thief, Toxic
 * C/RS/FL: Ice Beam
 * GS/C: Curse, Dream Eater, Dynamicpunch, Endure, Ice Punch, Icy Wind, Mud-Slap, Nightmare, Psych Up, Sleep Talk, Snore, Swagger, Sweet Scent
 * RS/FL: Calm Mind, Facade, Flash, Hail, Light Screen, Reflect, Secret Power, Skill Swap, Water Pulse

Breeding

 * GS/C/RS/FL: Meditate
 * RS/FL: Fake Out, Ice Punch, Psych Up, Wish

Other sources

 * Pokémon Stadium 2: Dizzy Punch

Trading Cards

 * Neo Revelation #54 - Smoochum
 * Aquapolis #60 - Smoochum