He looks like an orange dot on your town map or when you use fly he moves from a place to another.If you use fly to a town close to him he will flee to another town
image found here: http://www.camerony.com/479_1_rotom.jpg
First you have to go to the lake closest to your home town. Use surf and go to the little 'island' in the middle. enter and you will see mesprit. Go talk to mesprit and it will automaticaly flee (don't worry, you and mesprit just start playing a game of... 'tag'). All you have to do is look for mesprit with the Pokemon tracker and battle it. It's best to have a Pokemon that knows mean eye so it cant escape.
3 words look for it
You find him like Azelf and Uxie, at their cave except Mesprit will disappear when you talk to him/her(which ever gender you prefer).So don't bother saving your game. To battle him just look at your town map and Mesprit's face will be somewhere. But you should walk there be if you fly his location will change.I found him looking for a different Pokemon find the easiest way is to just look for different Pokemon and hope to find him/her (which ever gender you prefer) randomly.
Go to the top of Mount Coronet, using the cave system from Hearthome's side. Once you have reached the top, you will find Team Galatic's Boss's waiting for you, and they will challenge you to a fight. When you have beaten them, and have beaten the final boss, you can catch Dialga/Palkia (depending on whether it is diamond or pearl).
Mean Look Arena Trap (ability)
No. You can't look like a Pokemon in Pokemon diamond. My brother has diamond and he can't look like a Pokemon.
u can give ur Pokemon quick claw
Mean Look is effective against the Pokemon Mesprit to prevent it from running away. Keep in mind that Mean Look ends when the Pokemon that used it is switched out or faints.
If the Pokemon that used mean look fainted then mesprit can fled
asian
Its not Azelf its Mesprit that flees and you get it by using the Pokemon tracker app and you wil need a Pokemon with mean look so Mesprit does not flee.
it looks like a bush
There is no TM for it. You have to catch a golbat that knows it. I can see your looking for Mesprit or Cressila. Train the golbat to 100 speed or your mean look will perform after it flees lol. ~Wariolink~ Pokemaster
its kinda like an orange diamond with lightning surrounding it. it floats in air.
Mesprit does flee from the battles normally at the beginning. But if you manage to inflict damage on it then when you see it again it will still have the damage to it. The best way I found to catch Mesprit is to get a level 30-40 Pokemon that knows Mean Look, I evolved my gastly as i found my captured Haunters didnt know Mean Look. Then give your Pokemon that knows mean look a quick claw. Track down Mesprit using the Poketech app (forgot what it is called, my apologies >.
You have to look for them in Pokemon Diamond. you have to look around the corner of the shop.