Not a given, but it is a way to hinder Yanmega's performance. Just as you claim that Stealth Rocks may not always be set up, a Rapid Spinner may not always be there to save 'mega, or a ghost may just take care of said Rapid Spinner, and entry hazards such as SR are rather common. Reducing the ability to safely bring in 'mega (1/2 HP loss every time with SR) is a viable reason for his flaws.Agreeing about Yanmega, but why exactly is SR a given?
Without SR up, 'mega does become a serious threat to just about any Pokemon. With SR, 'mega can still be an annoyance for an unprepared team. Priority and scarfers can pick off an injured Specs 'mega, and Speed Boost variants can be T'waved walled by proper special sponges.













