Some singles players might recognize this Pokemon, and yes you aren't done dealing with it...or the other one I'll get to. Like Togekiss, the Gen 1 Pokemon Clefable received a type change during Gen 6, with it now being pure "Fairy-type" instead of Normal-type. The difference between this change is Clefable probably benefited the most out of all the "new" Fairy-types as it gained better resistances to Bug-, Dark-, Fighting-, and an immunity to Dragon-types. Wait...but didn't every Fairy-type receive similar changes? Yes, but Clefable has far less weaknesses,  moderate defenses stat distribution with potential recovery ( 95 HP / 73 Def / 90 Sp Def ), two great abilities in Magic Guard / Unaware, a strong support set similar to Togekiss, and can abuse Follow Me well as it only has to worry about Steel- and Poison-type hits, while everything else is neutral. In terms of offensive coverage, Clefables will likely use STAB Moonblast to hit any targets, notably Fighting-, Dark-, or Dragon-type hard. Other options might for an "attacking slot" might include Ice Beam to hit things like Landorus-T, Garchomp, Thundurus, etc hard, or maybe Icy Wind for speed control purposes.

Now we get to Clefable's main supportive options aside Follow Me. Clefable has access to one of the largest support moves in the game, and can utilize almost every one of these options to great lengths depending on the team composition (listed Clefable's Gen 6 Movepool). Some of these options include, but aren't limited to the following: Thunder Wave (speed control), Helping Hand (boost an ally attack by 50%), Heal Pulse (restores the ally's HP by 50%), Moonlight ( for 50% personal recovery), Encore ( lock a target into an unfavorable move, and Minimize (to be...that guy and Follow Me spam). For abilities, it basically up to the player to decide which one is better as both Unaware and Magic Guard have some clear differences in terms of some situations. Unaware allows the user to "ignore" stat boosts so Clefable will always take an attack as if its at neutral, or no stat boosts. Some implications with running Unaware is that sometimes Clefable might want "Intimidate" support, but given the mechanic of Unaware ignoring any stat boosts, this makes Clefable's longevity more or less always the same without any improvement. As a result, some players might opt for Magic Guard, which essentially ignores any residual damage from say weather, poison, burn, etc. Magic Guard Clefable won't be able to survive boosted hits, at least it can utilize any support options like Intimidate or Snarl to bolster its defensive / support value.

Now problems with Clefable. Note Clefable is now vunerable to Poison- and Steel-type hits so things like Aegislash's Flash Cannon, Mega Mawile's Iron Head, or Mega Venusaur's Sludge Bomb will always deal heavy damage, if not potentially net the OHKO. Unlike Togekiss who's at least moderately slow, Clefable is far slower by 20 base points, meaning just about any fast, or mediocre Pokemon can  be able to deal damage before Clefable can hit back. Aside using Taunt against Clefable, note it doesn't sport as many useful resistances to other offensive attacks, so spam the strongest STABs against Clefable. 

Now we get to Clefairy... which honestly can do just about the same thing as mentioned about Clefable, but here's some notable differences aside Follow Me and other support moves. First off, Clefairy relies on its item, Eviolite to gain slight higher defense and special defense from Clefable by a 50% boost. Some players might use Clefairy due to Item Clause as they might want Sitrus Berry, Rocky Helmet, Leftovers, or Safety Goggles on another Pokemon and can use Eviolite to make up for this. Perhaps the biggest reason to even consider Clefairy in the first place is its Hidden Ability Friend Guard. Essentially what this abilities does is reduces the damage done to its allies by 25%,  thus making potential setup Pokemon take any direct damage ( Single- or Spread-Target). Now pair this with a Power Up Punch Mega Kangaskhan, a Dragon Dance Mega Salamence, a Belly Drum Azumarill, or anything of that matter and they'll be able to tank hits easier, and live some fatal hits as Clefairy uses Follow Me.

 While Friend Guard + Follow Me Clefairy is a alternate viable redirection strategy, note some consequences (aside what I've mentioned regarding Clefable). Notice Clefairy only has a base 65 Special Attack stat so its not an immediate offensive threat like Clefable, except against those who take Super Effective STAB Moonblast hits. As a result of this, Clefairy is prone to Taunt, and if targeted can't really do much. Though this won't OHKO Clefairy immediately, Knock Off can remove the Eviolite item, and thus make Clefairy far weaker to standard attacks. Finally, focus down Clefairy with strong STAB or Super effective hits, or mitigate the setup with stat drops. 

Finally we get to a rather unconventional Follow Me user: Smeargle. With access to nearly all moves in the games, Smeargle can make for an interesting wild card, however one move alone makes the beagle dog a threat: Dark Void. Smeargle allows the user to play opposing mind games with opponent as whether they'll use Dark Void to net both Pokemon to sleep, or possibly use Follow Me to setup something like Power-Up Punch Mega Kangaskhan, or recently Geomancy Xerneas to get its boosts. Moody is used to allow Smeargle to potentially get "useful" boosts to aid in its redirection efforts, though reduce one by one stage only. A +2 raise in defense might allow Smeargle to tank a neutral hit twice when using Follow Me. An even more grim scenario is a +2 evasion boost, which might result on a target or two missing when using Follow Me. An accuracy raise might result in Smeargle hitting Dark Voids better, or even a +2 Speed boost can allow Smeargle to hit the opposing targets first. Aside the moves listed, Smeargle can learn, or use just about any move in the game, so be vigilant when facing it.

In terms of countering Smeargle, it really depends on the set, and if Smeargle doesn't get any "beneficial" boosts from Moody. The best chance to beating Smeargle is to look at the team composition first, look for any Quick Guard users, any setup Pokemon, or anything out of the ordinary. If there's a Quick Guard user, chances are Smeargle is Choice Scarf, and might use its item to get a quick Dark Void, then later use Follow Me as a scapegoat. Double targeting Smeargle early one is the best way to deal with it, and make sure these two Pokemon have a base speed, or investment higher than 139 actual speed (76+ base speed). Taunt is a decent response to neutralize Smeargle, but keep in mind the potential for Mental Herb, as this can be used to get a Dark Void off.