Where to catch, #0056
Mankey in Diamond and Pearl: 2 places, level 22
2 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 SilverFireRed and LeafGreenPlatinumHeartGold and SoulSilverX and YSun and MoonUltra Sun and Ultra MoonLet's Go, Pikachu and Eevee