Personally, I think you need to get some sleep man. The time of that edit is bad for you health and wellbeing I like the team other than the fact that my physical and special walls are both weak to SR. Other than that, I'll change the speed settings on Gatr and Amphy to hit max speed propably, unless they can spare some leftover EVs without missing on any speedtier. I'm also worried about Mega Aero a bit, I think it's faster than Gatr after one Dance. Arcanine can really break Mega Bees balls with the drops and the Helmet. Maybe I'll make it more offensive, perhaps add Crunch to say hi to Cresselia and Reuniclus and do them some chip damage? Intimidate and the Helmet though, I like them more than Entei.
I really have a great respect for these superfast megas though. Defog makes me nervous. My walls hate hazards... Are there any Spinners on the tier that are worth considering?
And then there's rain. Oh goodness Mega Pert.
Your presentation is fine, allthough I prefer sprites over icons (pls no gen6 gifs) and you do a great job giving insight about teambuilding and usage. Noting some threats would be awesome, replays too, if you have any. If you don't have any... I think you did too much already.
Edit: ok, how about a Hitmontop over Togetic? That thing is RU, but Vest and Intimidate make practically an Eviolite, it resists rocks, and it can be specially bulky, physically bulky, bulky in both to a disgusting level, and can fire strong attacks with good coverage or go to Technician Priospam. Togetic has recovery and doesn't take Spikes damage and TSpikes, and Hitmontop can't BatonPass for momentum, but hey.