The Ultra Ball (Japanese: ハイパーボール Hyper Ball) has a 100% higher chance to catch a Pokémon than a regular Poké Ball, and a 33% higher chance than a Great Ball. It has a catch multiplier of 2.0.

The Poké Ball, Great Ball, Ultra Ball, and Master Ball

What is the factor that makes Poké Balls such as the Ultra Ball and many others different from regular Poké Balls?

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    The technology that goes into improving the catch rate? Anyway, the numbers in your quote most likely comes from the game.
    – nhahtdh
    Feb 28, 2015 at 5:27
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    While I want to know myself, I voted to close. I don't think the reason as to why they can catch pokemon better was never explained, not in the games, manga, nor even in the anime. Heck I don't even think the mechanism is explained at all (could be wrong on that one though). Feb 28, 2015 at 12:10
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    Hmm .. I suppose I have to improve the question . But @PeterRaeves your comment should be posted as an answer . Its good :D Feb 28, 2015 at 15:11
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    This should not be closed. Just because we think there likely is not an answer within canon, doesn't mean we can say for sure whether or not that is the case. The answer could be in an interview that we have not encountered; it is pure speculation of us to suggest there is no canon answer.
    – Cattua
    Feb 28, 2015 at 20:21
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    @EroSennin Good, thanks. xD Added a bounty, I'd like to know a possible answer aswell now.
    – user4118
    Mar 6, 2015 at 9:12

2 Answers 2


My answer is based on canon facts, but, as far as I know, I don't think the mechanism was ever explained. The wiki on the Poke Ball mechanism agrees that the mechanism is unknown so far.

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As my own speculation, I'd say it might have something to do with the closing mechanism. As we can see in chapter 38, Giovanni damaged Red's Poke Balls' shutters during his gym fight, preventing the Poke Balls from opening and trapping Gyarados and Venusaur inside until the balls were repaired. The shutter must be key to catching/trapping a Pokemon in the ball. It might thus be the case that Ultra Ball has a more advanced or stronger lock than a regular Poke Ball, making it harder for the Pokemon to open the lock and escape from the ball. With the Master Ball having the perfect lock, as not even Mewtwo could escape after being caught by Red, in chapter 35, while still being at almost full power.

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As we can see, the Poke Balls are empty inside. The only thing it seemingly does is shrink the Pokemon. There is no inducing gas or anything inside to weaken the Pokemon. Pokemon do undergo a change in character when being caught though. We have seen the most bad-ass Pokemon turn into loyal servants/friends after being caught. But this might be due to the Pokemon's honour submitting to its defeat, or it might be that the Poke Ball actually does something to the Pokemon during the bounce process. We don't really know the correct answer to this so far. Again, Mewtwo could be seen as a good example, as he didn't start rampaging after being released from his ball, but he came to respect his trainer Blaine.


This video explains how Pokeballs work in the best way I've seen: https://www.youtube.com/watch?v=nvCZNEsld54

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    In its current form, this is effectively a link-only answer, which is discouraged on Stack Exchange. (Links can disappear over time, and in that case, the value of the post will be lost.) Could you perhaps summarize in your post the key points from the video that you thought were important?
    – Maroon
    Jul 29, 2016 at 16:38

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