You have to have beat the Cyrus and the Distortion World. Then go to Twinleaf Town and go to the lake by it. Surf to the middle and go to the cave. There you'll find Mesprit.
mesprit is at the descon wold and then it will be at verity lakefront and then it will start going around sihhoh in Pokemon platinum
you find them in the three lakes in diamond, pearl, and platinum.
they keep running around the region like mesprit
chase it down
no mesprit is not the new mew u can still get mew in pókémon platinum
You can not. Mesprit ca be obtained in the following games:Pokemon DiamondPokemon PearlPokemon Platinum
Yes but first you have to get Giratina and then you go inside the cavernsat the lakes.
it's in lake verity
at the lakes
You get a Pokemon entry in your pokedex.
First you meet it in one of the caves.Then it roams the nation
That is impossible. The only way to get mesprit in soulsilver is to get on trough GTS (in Goldenrod) or trade one from Diamond,Pearl,Platinum.