Where to catch, #0366
Clamperl in Diamond and Pearl: 2 places, levels 20 to 30
2 encounters by area
Places
Route 219 and Route 221
Other games
Also found in 7 other games
Ruby and SapphireEmeraldHeartGold and SoulSilverBlack and WhiteBlack 2 and White 2X and YUltra Sun and Ultra Moon