Where to catch, #0019
Rattata in Platinum: 2 places, level 47
4 encounters by area
Places
Route 225 and Sea Route 226
Other games
Also found in 11 other games
Red and Green (Japan)Red and BlueYellowGold and SilverCrystalFireRed and LeafGreenDiamond and PearlHeartGold and SoulSilverBlack 2 and White 2Ultra Sun and Ultra MoonLet's Go, Pikachu and Eevee