Yes, and here's how: get a Wobbefet or Dugtrio from either LeafGreen or FireRed. Then, find Mesprit using the poketch app. Have Wobbefet or Dugtrio first in your party, and battle it until it gets to red hp, and if possible, paralyze it. Keep throwing ultra balls at it, and eventually you will catch it.
Here's why it works. Dugtrio and Wobbefet both have abilities which don't allow Mesprit to flee. You can also have a Golbat/Crobat and use mean look, but the method above works best.
Note: this method can also be used for catching Cressilia.
Use Electric Types To Paralyze The Get The Life Low And Use Ultra Or Great Ball.
jiroxy ball...
Yes. It is completely possible to catch Mewtwo with an ultra ball.
A Master Ball
Yes, the Ultra Ball has a 4x catch rate than a Premier Ball, which has the same catch rate as a normal Poke Ball. It is commonly used to catch rare or Legendary Pokemon.
No, not quite. An ultra ball should do it. Catch and/or use a Pokemon that knows Mean Look such as Golbat/Crobat. Then weaken Mesprit so you can catch it. If it faints turn your game off and then back on. Just make sure you have lots of ultra balls and potions (hyper/max/full restore).
it'll be in the grasses of sinnoh use meanlook + hypnosis then ultra ball
You can with some luck. To get better chances, you should have them at very low HP and either asleep, paralyzed, or frozen. If you try, you can catch any Pokemon with an Ultra ball.
Use Electric Types To Paralyze The Get The Life Low And Use Ultra Or Great Ball.
jiroxy ball...
Ultra ball.
Yes. It is completely possible to catch Mewtwo with an ultra ball.
ultra ball
ALOTof ultra balls
get a ultra ball lower its hp to half and throw the ultra ball
A Master Ball
if youre trying to catch mesprit and the others on Pokemon pearl i suggest you use a master ball on mesperit and and ultra balls on the others because mesperit runs away if you use an ultra ball on it moodduke:well i used a masterball on my dialga i don't no what to do now even even killed uxie and other one but im still trying to catch mesprit im getting into the dark when i get to her but when i use a dusk ball on it it comes out and runs