How do you capture mesprit?

Answer 1

You need a Pokemon which knows the move "Mean Look" which will stop it from running away ghost Pokemon have that move like gastly.

Balls: You need Dusk balls or Quick balls you need the Marking Map it shows a monster icon that is where mesprit do not fly or it will go to somewhere else.

*alot of the time mesprit is faster that your Pokemon so before you use mean look equip the Pokemon with an X Speed (you can buy them on floor 2 in velistone city's department store)

Sometimes an easy way to get to mesprit is to fly somewhere completely random and mesprit will often move somwhere closer to you.

also, if you don't have mean look, then every time you encounter it, weaken it a little because then when it flees and you encounter it again, its HP will not have restored from the last battle. so when you finally encounter it and its hp is low, use a quick ball!

Hope this helps!