hey, only goose liked MY analysis!(approved by Joshz)
NUMEL'S AG ANALYSIS
"It's not very effective... Numel lost 100% of its health!"
Numel can counter Klefki, because of its immunity to both Thunder Wave (due to its Ground typing) and the confusion inflicted by Swagger (thanks to its ability Own Tempo).
However, while this is great if you really hate Klefki, Numel is totally uncapable of doing anything else. In fact, it can't even beat Klefki if it's running Hidden Power Water. All in all, Numel is as bad as it looks, and thus it shouldn't be considered for any serious Anything Goes team.
name: Klefki counter
move 1: Lava Plume / Fire Blast
move 2: Will-O-Wisp
move 3: Toxic
move 4: Protect
ability: Own Tempo
evs: 248 HP / 252 Def / 8 SpA
Lava Plume is the main STAB attack and it's super-effective against Klefki, and packs a 30% burn rate that might discourage the opponent from switching a powerful physical attacker in. Fire Blast, however, it is a more powerful option, although the reduced burn rate makes it easier for the opponent to hard switch on it and start setting up or attacking. Will-O-Wisp burns the opponent, reducing the damage Numel takes from Klefki's Foul Play, as well as burning whatever the opponent sends in, provided they don't hold a Lum Berry. Toxic is used to cripple and wear down bulky Pokémon or special sweepers in general if they're hit on the swap. Protect allows you to stall for more burn or poison damage.
The EVs, a Bold Nature and 0 Attack IVs minimize the damage Numel takes from Klefki's Foul Play. Own Tempo makes Numel immune to confusion, so Klefki can't resort to Swagger to break through it. 248 HP EVs also reduces Stealth Rock damage at no cost. The leftover EVs are placed in Special Attack so Numel can hit Klefki harder, as they won't be useful when placed in any other stat. Eviolite greatly increases Numel's bulk, again to take as many Foul Plays as possible. Passho Berry is an option if Hidden Power Water Klefki scares you, however the loss of bulk is very noticeable and Hidden Power Water Klefki is very rare.
You must bring Numel in without taking any damage at all. Any hit will dent Numel and it might not be able to take on Klefki at low health. The first thing you should always try to do when Numel is facing Klefki is to burn it, reducing its damage output and overall usefulness. Despite having multiple options to cripple whatever the foe sends in, Lum Berry is extremely common in the metagame, so most of the time the wisest option is to double switch. Don't be predictable when using Protect, as the opponent might set-up or send something in for free while you waste a turn.
Numel can't take hits at all, so a wall that can sponge hits for it it's recommended. Giratina-O has excellent synergy with Numel, as it resists Water and it's immune to Ground thanks to Levitate, so it's a great partner for it. Lugia is also a good option, while it does not resist Water, it is still immune to Ground and has reliable recovery. Both can provide Defog support as well.
A status absorber can take the status that Numel hates. Refresh Silk Scarf Arceus is great at this and can beat Darkrai easily. Zekrom can't absorb status unless it is running Sleep Talk, but can force out Lugia, which would wall Arceus forever. However, it shares a Ground weakness with Numel.
A way to bring Numel in safely is almost compulsory. Baton Pass, U-turn or Volt Switch are all safe ways to do so. Smeargle is a great Baton Pass user for Baton Pass teams, and can pass Numel Moody boosts, although Numel won't take advantage of them. VoltTurn partners include Zekrom again and Landorus-I, but they stack a Ground and a Water weakness respectively.
Sweepers that appreciate Klefki gone are obvious partners, any Swords Dance Arceus forme or Mega Rayquaza are some examples, especially if they lack Lum Berry or a way to hit Klefki for super-effective damage.
Incinerate is a gimmicky option that can burn the opponent's Lum Berry on the switch while dealing a bit of damage, but Will-O-Wisp or Toxic are superior options most of the time as they also consume the opponent's Lum Berry while statusing the switch-ins not holding one. Stockpile + Eviolite might allow Numel to take some hits, but the only thing Numel can really do is countering Klefki so it is not worth it. One can also put the universal Stealth Rock on Numel, but it won't be able to set it up on most matches. Yawn can force switches. Mud Slap can be used to annoy switch-ins, while Sleep Talk might score you a surprise burn or toxic poison on Darkrai. Both options are unreliable though. Numel has access to Charm and Scary Face too to cripple whatever the opponent might switch in, but Toxic it's a better option overall.
Checks and Counters
**Hidden Power Water Klefki**: While it is rare, some Klefki run Hidden Power Water to nail Numel. Numel is especially weak to it if it's not holding a Passho Berry.
**Direct attacks**: Even with Eviolite, Numel has pathetic bulk and it will fall to any decently powered attack.
**Status**: Numel doesn't usually run a Lum Berry, which makes it very weak to status, such as sleep from Darkrai or Toxic from Lugia.
EDIT: Fixed a small error.
OK, the moves seem a little redundant since you have Lava Plume and Will-O-Wisp on the same set. Perhaps you should get rid of one of them? In fact, I don't really think that an attacking move (unless it's for utility) should be run on Numel, since it's weak and not really going to be used besides when Numel has nothing to do. Maybe Stealth Rock would be a good option in place of either.