Where to catch, #0321
Wailord in Diamond and Pearl: 2 places, levels 35 to 55
2 encounters by area
Places
Sea Route 223 and Sea Route 230
Other games
Also found in 9 other games
Ruby and SapphireEmeraldPlatinumBlack and WhiteBlack 2 and White 2Sun and MoonUltra Sun and Ultra MoonSword and ShieldThe Isle of Armor