I've been resetting multiple times in order to get a Mewtwo with the Timid nature and good IVs. The last one I caught is timid and has the following IVs:
25 HP / 31 ATK / 31 DEF / 31 S. ATK / 25 S. DEF / 31 SPD
Keep or reset? The perfect IV in attack seems a bit of a waste when it could've gone into HP instead.
On a side note, which mega evolution for Mewtwo is stronger these days? I have X, but I plan to transfer him to ORAS so I can use Y. Should go for a Mewtwo that has a nature suited for X or nah?