>>37953186If you look at Ghetsis' team in B/W, you'll see it's tailor-made to utterly destroy N's, with multiple counters for Reshiram/Zekrom. Hydreigon alone could take out most of N's Pokemon. Ghetsis either was preparing for the possibility of N betraying him, or intended to mruder N from the get-go once the latter outlived their usefulness.