Wow SAVIOR DOGE joins RU, Mega Houndoom+Slurpuff combo in RU lgi. Still Houndoom will be a really cool mon because it owns Doublade, Delphox, and other Psychic-types and Mega Houndoom is a bone crushing sweeper that almost nothing can wall. I'll also actually use Emboar as a Houndoom answer lol.
Metagross with its new Mega makes a comeback in OU and returns to its superstar status that it held in ADV and DPP, once again living up to its pseudo-legendary status. So this Pokemon starts off in stardom, begins to take a huge fall in BW and then XY, and then comes back with a vengeance. Welcome back Metagross (forever my favorite pseudo-legendary).
Sceptile also returns to RU with its Mega Evolution, another welcome back to the RU crew for Sceptile.
Oh and Dragalge makes it into RU with Adaptability, great to see, Dragalge has always been a decent mon in RU and with Adaptability it's even better now. Slurpuff pls join RU.
Beedrill and Altaria went all the way from PU to UU, a huge jump, and Mawile is going to be ass in UU lol... Oh at least UU won't have to deal with Salamence for a good month or so even though it sucks ass in OU. Sableye is also incredible now with its new Mega Evo and boy I'm relieved to get rid of that thing in UU.
Other than that not much really happened, many of the tier shifts were due to the new ORAS megas, only Mawile and Wobbuffet dropping really happened but that's because they're ass now with the nerfs from bans.
PS: Also UU players pls stop using Espeon and let that piece of garbage drop to NU where it belongs kthanx.