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.
Chat with our AI personalities
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.