MasterBall
Yes. It is completely possible to catch Mewtwo with an ultra ball.
You can catch Mewtwo easily by using a Master Ball on it or by using an Ultra Ball on it after lowering its HP.
I prefer to use my Master Ball for Mewtwo, but at least use an Ultra Ball.
masterball
You can probaly catch him with a ultra ball but I would use the master ball
Master Ball
master ball ultra ball quick ball or a premier ball
You can catch Mewtwo with any Poké Ball and those include the regular Poké Ball as well as the Great Balls, Ultra Balls, Dusk Balls and Nest Balls.
masterball
In Pokémon FireRed, the best Poké Ball to use for catching Mewtwo is the Ultra Ball, as it offers a higher catch rate than standard Poké Balls. If you have access to a Master Ball, it is the guaranteed way to catch Mewtwo without fail. Additionally, using status effects like sleep or paralysis can increase your chances of a successful capture. Be sure to lower Mewtwo’s HP carefully before throwing your Ultra Balls.
Well it matters what game you have, if you have Pokemon fire red, you can catch it with a master ball
With a master ball.