It’s been a long time coming, but Mewtwo finally makes a return in Pokemon X and Pokemon Y as a pokemon you can catch and train.
Mewtwo has always been one of the most desired and rarest pokemon in the series, and is still one of the most powerful psychic pokemon in the game.
What You’ll Need
The first step to catch Mewtwo is to first beat the Elite Four and become the Pokemon Champion.
You’ll probably want to bring a bunch of Dusk balls since you’ll be fighting Mewtwo inside of a cave, unless you’ve saved your Master Ball of course. Dusk balls will give you 3.5x chance over regular pokeballs inside of a cave.
It will be a long fight, so bring some Timer Balls as well to get a max of 4x catch chance later in the fight.
Also be careful which of your pokemon you bring to the fight, as he’ll whoop the crap out of your poison and fighting pokemon.
Once you have beaten the Elite Four, go back to Pokemon Village. In the northern area of Pokemon Village you’ll find a cave that was previously being blocked by a man that refused to move out of your way. For whatever reason, he’s no longer there.
Maybe he’s intimidated now that you’re a bad ass, who knows?
You’ll find Mewtwo inside of this cave as a static spawn. Make sure to save your game before you fight him.
Speaking to Mewtwo will begin a short cutscene, and then the fight will begin.
The biggest problem you’ll have fighting Mewtwo will be his Recover ability, which he basically spams to keep healing himself when he gets low. This is a pain in the ass, but you can’t really do much about it besides keep at it and let him run out of PP.
Paralyzing moves work on him and will help to reduce the damage your pokemon receive.
Once you see that he isn’t using Recover any longer, it’s time to finally wear him down to the point where you can catch him. At that point chuck every Dusk Ball you can at him until he’s caught.
If you’ve tried a ton of Dusk Balls and they’re still failing, make sure his health is low enough to catch him, and/or switch to some Timer Balls if it’s been a long fight to increase your odds slightly.