Ho Oh

Ho-Oh's relatively high Attack stat, strong STAB Brave Bird, and powerful STAB Sacred Fire, which also has a high chance to burn, make it one of the most difficult Pokemon to switch into. Its typing, annoyingly high Special Defense, access to Recover, and fantastic ability in Regenerator give it the staying power to continually apply pressure to the opposing team, as well as the ability to check many threats, including Geomancy Xerneas. Ho-Oh also received a godsend in two new, reliable Magic Bounce users in Mega Diancie and Mega Sableye, which can keep Stealth Rock off the field for it. Latios and Latias also regained their Soul Dew, making them some of the best users of Defog in the game in order to help Ho-Oh with its crippling weakness.