Pokémon/Pokédex/Mewtwo

TM/HM

 * RB/Y/GS/C/RS/FL: Blizzard, Double Team, Fire Blast, Flash, Hyper Beam, Psychic, Rest, Solarbeam, Strength, Thunder, Toxic
 * RB/Y/RS/FL: Reflect
 * GS/C/RS/FL: Frustration, Hidden Power, Iron Tail, Protect, Rain Dance, Return, Rock Smash, Shadow Ball, Sunny Day
 * RB/Y/C/RS/FL: Ice Beam, Thunderbolt
 * C/RS/FL: Flamethrower
 * RB/Y: Bide, Body Slam, Bubblebeam, Counter, Double-Edge, Mega Kick, Mega Punch, Metronome, Mimic, Psywave, Rage, Seismic Toss, Selfdestruct, Skull Bash, Submission, Substitute, Take Down, Teleport, Thunder Wave, Tri Attack, Water Gun
 * GS/C: Curse, Detect, Dream Eater, Dynamicpunch, Endure, Fire Punch, Headbutt, Ice Punch, Icy Wind, Mud-Slap, Nightmare, Psych Up, Sleep Talk, Snore, Swagger, Swift, Thunderpunch, Zap Cannon
 * RS/FL: Aerial Ace, Brick Break, Bulk Up, Calm Mind, Earthquake, Facade, Focus Punch, Hail, Light Screen, Rock Tomb, Sandstorm, Secret Power, Shock Wave, Skill Swap, Snatch, Taunt, Torment, Water Pulse
 * RB: Pay Day

Trading Cards

 * Base Set #10 - Mewtwo
 * Gym Challenge #14 - Rocket's Mewtwo
 * Neo Destiny #109 - Shining Mewtwo
 * Expedition #20 - Mewtwo
 * Expedition #56 - Mewtwo
 * EX Ruby & Sapphire #101 - Mewtwo EX
 * EX Team Rocket Returns #99 - Rocket's Mewtwo EX