just go to the Pokemon league
after you relese uxie,azelf and mesprite
yes if you dont catch them
zapdos get it in the end of the game when you complete pokedex catch like mesprite
Mesprite is at Lake Verity in the small cavern in the centre of the lake. Hit A to battle and then it will flee.
It is never seen again,or that's what I think.
Uxei doe not run, mesprite does. mespriet is one of the running Pokemon much like entei, raikou, and suicune in gold and silver. if you look on your marking map you will see a Pokemon symbol, that is where mesprite is, however mesprite will move if you change locations.
heatran dialga palkia uxi mesprite
surf until you get to the cave in the middle of the lake and mesprit should be there
Uxie , Azelf and Mesprite can be caught on land or a lake
uxie groudon mesprite azelf and dialga
the best way to catch creselia is to weak it and when its hp is red catch it with a quick ball.the quick ball must be used when you find the Pokemon and throw as your first ball without a move the best way to catch mesprit is to throw your master ball at it. (i havent caught creselia yet.) or you can use a masterball on both if its hard ue a quickball on either when their weak(i havent caught any of them im trying though)
try using the move 'mean look' on it so it cant escape.