Don't use this:
Umbreon @ Leftovers
Ability: Synchronize
EVs: 252 HP / 4 Def / 252 SpD
Calm Nature
- Foul Play
- Wish
- Protect
- Heal Bell
Why it's bad:
Oh Umbreon. I don't get why the low ladder are so obsessed with you. Umbreon, on paper, looks like an okay cleric; it resists Knock Off, it's ability is pretty sweet, it's bulky, etc. But even then, problems arise. In this generation, it's defensive typing is awful; fighting types like Keldeo are everywhere and the Fairy type is omnipresent nowadays, making Umbreon lose effectiveness completely. On top of that, Umbreon actually has what I deem 4MSS; it'd LOVE toxic, but without Foul Play it's complete set up fodder for a large number of Pokemon. However, the main problem with Umbreon comes from how outclassed it is.
Instead, use this:
Clefable @ Leftovers
Ability: Unaware
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
- Moonblast
- Wish
- Protect
- Heal Bell
Why it's better:
"But it's less bulky!" I hear you cry. Regardless, Clefable is a FAR better cleric than Umbreon could ever dream of being. It's got a better defensive typing, a good STAB, the ability to beat Mega Sableye 1v1 and most importantly,
Unaware or Magic Guard. Both of these are absolutely fantastic abilities for a Cleric to have; the former makes Clefable unable to be set up on; now it's never set up fodder, and can stop a number set up sweepers in the tier from sweeping a stall team simply by slapping Clefable on. The latter helps in match-ups vs other stall teams, making rocks, spikes, leech seed, toxic etc do absolutely no damage to you, which is a very nice trait in match ups like this as it prevents Clefable being worn down by anything other than direct damage. But this isn't your only option over Umbreon...
OR
Sylveon @ Leftovers
Ability: Pixilate
EVs: 252 HP / 220 Def / 36 SpD
Bold Nature
- Hyper Voice
- Wish
- Protect
- Heal Bell
So you wanted a Cleric that didn't auto-lose to Landorus lacking the rare Sludge Wave, and took less from Scarf Keldeo? Here's your answer. Sylveon is a usable cleric as well: it's very similar to Clefable, with 2 major turning points, the first of which I've already said. Sylveon is far superior to Umbreon due to it's massive offensive presence. Hyper Voice from this thing really hurts, giving it a large amount of offensive presence to play with, and making it a better fit for teams that lack this. Another reason Sylveon outclasses Umbreon is because it has the option to run a fully specially defensive spread, which beats Specs Keldeo 1v1. All in all, it's yet another Cleric that outclassed Umbreon in both use as a Cleric and cuteness, showing us why we should never use it.
Another one of these posts on Espeon coming soon!