Where to catch, #0023
Ekans in Let's Go, Pikachu and Eevee: 2 places, levels 3 to 12
Let's Go, Pikachu and Eevee: the game page
No encounter in Let's Go, Pikachu.
2 encounters by area
Places
Route 3 and Route 4
Other games
Also found in 10 other games
Red and Green (Japan)Red and BlueGold and SilverCrystalFireRed and LeafGreenDiamond and PearlPlatinumHeartGold and SoulSilverX and YUltra Sun and Ultra Moon