somewhere in lake verity
After you've released Uxie, Mespirit and Azelf from Team Galatic HQ, go to Verity Lake. Surf across to the cave. Inside you'll see Mespirit. Talk to it. After it runs away, it will be roaming the Sinnoh.
lets see....heatran, giratina, uxie, mespirit, azelf, darkrai....yeah
simple.... your poke's slower than mespirit
just use a master ball.if not weaken it every time u see it then try to catch it
after you go to spear pillar you go to one of the lakes(forget which one). you go in the cavern and you will see mespirit. talk to him and then he will fled. proffeser will come up talk to you and will leave.now use the link searcher(talk to president of poketech apps to get it) then you will see a face on the app. that's mespirit. so when ever you enter a route/town/city/other area he will move so go to an area when youre entering a place(right under sandgem town is the eisiest). then youkeep going in and out of the town until mespirit is under the town you will notice that you are to. then go in the water andyou will see mespirit.then catch him.(only for diamond pearl and platinum).
Emuritto is the Japanese name for Mespirit. So emuritto is Mespirit, to answer your question. :P
After you vs Palkia go to Lake Verity and into the cave. Mespirit will be there and will flee when you see her. Get the Poketracker app from the president guy in Jublife city to track down Mespirit. When you go to find her have a Pokemon first in your party that knows mean look. If it's not first Mespirit will flee before you get the chance to switch out. Make sure you have a master ball.
Sorry, but no.
nooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo
weaken mespirit a bit and use dusk and quick balls you might be able to use heal balls on it
catch them from there lakes then mespirit will run away so maybe use a materball
Here is a walkthrough on how to catch Mespirit: http://www.youtube.com/watch?v=ee1-2AU0k6w Do exactly what he tells you to do!