Pokémon/Pokédex/Squirtle

TM/HM

 * RB/Y/GS/C/RS/FL: Blizzard, Dig, Double Team, Rest, Strength, Surf, Toxic
 * RB/Y/C/RS/FL: Ice Beam
 * GS/C/RS/FL: Attract, Frustration, Hidden Power, Iron Tail, Protect, Rain Dance, Return, Rock Smash, Waterfall
 * RB/Y: Bide, Body Slam, Bubblebeam, Counter, Double-Edge, Mega Kick, Mega Punch, Mimic, Rage, Reflect, Seismic Toss, Skull Bash, Submission, Substitute, Take Down, Water Gun
 * GS/C: Curse, Defense Curl, Dynamicpunch, Endure, Headbutt, Ice Punch, Icy Wind, Mud-Slap, Rollout, Sleep Talk, Snore, Swagger, Whirlpool
 * RS/FL: Brick Break, Dive, Facade, Focus Punch, Hail, Secret Power, Water Pulse

Breeding

 * GS/C/RS/FL: Flail, Foresight, Haze, Mirror Coat, Mist
 * GS/C: Confusion
 * RS/FL: Mud Sport, Refresh, Yawn

Trading Cards

 * Base Set #63 - Squirtle
 * Team Rocket #68 - Squirtle
 * Expedition #131 - Squirtle
 * Expedition #132 - Squirtle
 * EX Team Magma vs Team Aqua #46 - Squirtle
 * EX FireRed & LeafGreen #82 - Squirtle
 * EX FireRed & LeafGreen #83 - Squirtle

Naming
Possibly named as a combination of the words Squirt and Turtle.