Mega Gardevoir's unique typing is actually a problem as well with Destiny Bond.You completely missed the point of my post...that's like saying Ebelt Aromatherapy Xerneas is like Sylveon. Will-o-Wisp is used to lure Aegislash, a common switch-in to Gardevoir-Mega. What Mega-Gardevoir runs is [move]+3 Attacks, similar to Aromatherapy+3 Attacks Xerneas. Mega-Gengar may do that better, but does Mega-Gengar have that suprise factor, Fairy STAB, or the same unique typing as Mega-Gardevoir? One common move in two completely different Pokemon's movepool's outclassed does not make. You completely dismiss Xerneas's perfectly other viable sets and also severely underrate the value of Taunt. Taunt is a great disruptor move, from preventing SR to allowing a status-weak teammate to switch in for free. I don't think you understand what Clefable does...all you are doing is repeating that they deserve C-Rank with no real reasoning.
No shit it's the Ubers tier. Don't forget you dont have to use bog-standard Pokemon. It's clear you don't grasp how to use Mega-Gardevoir / Clefable. If you don't use them for their specific niches, they won't preform well.
What I said was a comparison between offensive sets... Obviously, Xerneas has more sets, but these sets are irrelevant. Do you want me to expand on Xerneas' ather sets? Chances are that you're gonna say "They perform a different role." So why refer to them? Plus, that is on more reason to say Gardevoir is outclassed. You said that among Gardevoir's niches is the surprise factor. Well, in that case, same goes for Xerneas. Geomancy might be super common, but it also has other tricks up its sleeve. Also, read through all of my post. Yeah, I don't use Gardy or Clefable, but I have faced them. I can't say much on the subject apart from what I've seen. And what I've seen makes me think that C-Rank is just fine for these two.
Look, I don't wanna pick a fight with you... In the long run, we won't agree. I'll just say Mega Gardevoir for C-Rank and be done with it.