Ability: Fur Coat
EVs: 252 Defense / 252 Special Defense / 4 Attack
I believe that Furfrou is such an underused Pokemon. It could be such an amazing wall. Fur Coat halves all Physical Attacks, which protects it from Fighting types. It's nature, Impish also helps with this, as does its EVs. And if Furfrou ever actually does get hit hard, he's got the Leftovers for recovery. Protect and Toxic are already pretty annoying, and wears the opponent down very slowly. Sucker Punch is mainly for a damaging attack. I wasn't sure if I should go with Sucker Punch or Retaliate, but I went with Sucker Punch so I would have something on Ghost Types. Overall, I think Furfrou should be used a lot more, but what do you think of it? I'm not very good at spotting cons in Pokemon, so the only one I can see is Fighting Types.
I've always really liked poor Furfrou and I hope I can find a way to use him. Furfrou can be a wall, but he is basically outclassed by anything that has recovery. Furfrou has a few weaknesses - mainly a poor HP stat and a poor Sp Def stat, he has no recovery whatsoever, and he is completely walled by Gengar, who is very common. He is a physical wall, for sure, and Normal is actually pretty good typing. The reason that people don't use him is the poor stats (like I said), Gengar, no recovery, and a shallow move pool.
You should NEVER rely on Sucker Punch as your only attack. Once your opponent figures out that Sucker Punch is your only attacking move, s/he will just Toxic stall or PP stall you until you die. Also, Furfrou is going to die to any special attack because he's a physical wall. You need to put your EVs in Defense and HP - don't bother with more than 4 Sp Def EVs; you need a Special wall on your team to handle those attacks. A better Furfrou set is this:
252 HP/252 Def/4 SpDef
Cotton Guard - Furfrou RELIES on Cotton Guard because of its low Defense stat. In order to use Furfrou as a physical wall, you need to set up a Cotton Guard. This is another reason why Furfrou isn't used much - because after you set up, your opponent can just switch into a Special attacker and then you'll have to switch out and lose the Cotton Guard, and you've wasted a turn. The only time a wall can set up like this is if it has a move like Cosmic Power that raises both Defense AND Special Defense.
Toxic - Furfrou needs Toxic because it's basically the only way for it to kill things because its Attack stat is so low.
Return - Furfrou's best attacking move is Return. It gets STAB and it has a high base power.
Roar/U-Turn - which one you want is up to you. If your opponent sends out a Special Attacker, you can attempt to Roar it away or U-Turn out. Furfrou has a high base Speed but it will still be outsped by most of the common Special Attackers, like Mega Lucario and Chandelure. It does outspeed Aegislash, though, which is something that it has going for it.
Once again, there is NOTHING that Furfrou can do to Gengar, which is a huge problem.