Pokémon Diamond and Pearl/Route 212

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Pokémon Type Levels
Kricketune Image:PkmnType_Bug.gif 14-18
Bibarel Image:PkmnType_Normal.gif/Image:PkmnType_Water.gif 16-18
Wooper Image:PkmnType_Water.gif 18
Roselia Image:PkmnType_Grass.gif/Image:PkmnType_Poison.gif 20

Just go south, than east to Pastoria City, or go in the pokemon mansion.