Starters at 5% encounter
Bulbasaur - Route 6 (north Vermilion)
Charmanderino - Rock tunnel
Squirtle - Route 24 (north Cerulean) (with any rod)
Chikorita - Route 32 (south Violet)
Cyndaquill - Union cave
Totodile - Route 34 (south Goldenrod)
Treecko - Petalburgh woods
Torchic - Granite cave
Mudkip - Route 110 (north Slateport) (with any rod)
Turtwig - Eterna forest
Chimchar - Route 207 (north Oreburgh)
Piplup - Lake Verity (with any rod)
Snivy - Pinwheel forest/Route 20 (west Virbank)
Tepig - Route 4 (north Castelia)
Oshawott - Route 3 (east Nacrene)/Route 20
Chespin - Route 5 (east Camphrier)
Fennekin - Santalune forest
Froakie - Route 22 (east Santalune)
Rowlet - Verdant cavern
Litten - Trainer's school
Popplio - Hao' oli outskirts
Grookie - Dappled grove
Scorbunny - East lake Axewell
Sobble - West lake Axewell