I don't know why people ask questions like this...
- Bulbasaur: Chlorophyll (Raises Speed during in Sunshine)
- Charmander: Solar Power (Raises Sp. Atk in Sunshine but lowers HP)
- Squirtle: Rain Dish (Gain 1/16 HP every turn in Rain)
- Chickorita: Leaf Guard (Immunity to Status' in Sunshine)
- Cyndaquil: Flash Fire (When hit by a Fire attack, it powers up its own Fire attacks)
- Totodile: Sheer Force (Boosts power of moves with a secondary effect by 30% and removes the secondary effect.
- Treecko: Unburden (Doubles speed when your item is lost)*
- Torchic: Speed Boost (Raises Speed every turn)
- Mudkip: Damp (Prevents self-destructing moves)
- Turtwig: Shell Armor (Immunity from Critical hits)
- Chimchar: Iron Fist (Boost power of punching moves)
- Piplup: Defiant (When its stats are lowered, its Attack will rise)
- Snivy: Contrary (Stat changes will have the opposite effect
- Tepig: Thick Fat (Raises resistance to Fire and Ice attacks)
- Oshawott: Shell Armor (Immunity to Critical hits)
I hope this helps in whatever way you need it to!
* Thank you for the note Lucario.