Johto ones:

Sentret
Furret
Ledyba
Ledian
Spinarak
Ariados
Igglybuff
Mareep
Flaaffy
Ampharos
Hoppip
Skiploom
Jumpluff
Aipom
Sunkern
Sunflora
Murkrow
Misdreavus
Girafarig
Pineco
Forretress
Dunsparce
Gligar
Snubbull
Granbull
Heracross
Slugma
Magcargo
Houndour
Houndoom
Phanpy
Donphan
Smoochum
Miltank

Starters can't have regional forms, so I didn't put them.