Whoa, man, it's an unscarfed and non-CM Keldeo. That's like, flabbergasting to a good majority of the Pokemon community. Whoa whoa whoa I totally did not go there and actually slap a Choice Specs on Keldeo, no fucking way, right? WRONG! I did and it was a great decision because this thing fucking WRECKS. Let's take a look, shall we? 
tuff pony (Keldeo-R) @ Choice Specs
Trait: Justified
EVs: 4 HP / 252 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)
- Surf
- Secret Sword
- Hydro Pump
- Hidden Power [Ice]
Yes, yes, the thing is totally walled by Jellicent, I don't give a flying fuck. If you can't take care of Jelli on your team, then you shouldn't fucking use Keldeo. As for me, I do have shit for Jelli and the other "counters" to Keldeo. Now, a Specs Keldeo operates a bit differently than Scarfed. Specs is more suited for Rain [as is scarfed, however you can use that on other teams and have good results] because it just makes everything not named Jellicent its bitch. Even Slowbro, Slowking, and Celebi find themselves 2HKO'd by Rain boosted specs Pump. I don't run that ridiculous Icy Wind and HP Ghost Keldeo non-sense, simply because Icy Wind is fucking weak and HP Ghost doesn't do much to Jellicent anyways. I find that having Surf and Hydro Pump is definitely helpful when I know Surf can KO and don't wanna take the risk of it missing or using up one of the eight precious PP it has. Secret Sword is a given, gg Chansey, Blissey, Ferro, and friends. HP Ice for the Dragons like Salamence, DNite, Latios, etc.. Make sure to run an IV set of: 30/31/30/31/31/31 to ensure you have HP Ice and not sacrifice a precious Speed IV. Please have fun with this set and just fucking destroy everything in your path. If you misuse it and it doesn't work good for you, that's on you, not me.
tuff pony (Keldeo-R) @ Choice Specs
Trait: Justified
EVs: 4 HP / 252 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)
- Surf
- Secret Sword
- Hydro Pump
- Hidden Power [Ice]
Yes, yes, the thing is totally walled by Jellicent, I don't give a flying fuck. If you can't take care of Jelli on your team, then you shouldn't fucking use Keldeo. As for me, I do have shit for Jelli and the other "counters" to Keldeo. Now, a Specs Keldeo operates a bit differently than Scarfed. Specs is more suited for Rain [as is scarfed, however you can use that on other teams and have good results] because it just makes everything not named Jellicent its bitch. Even Slowbro, Slowking, and Celebi find themselves 2HKO'd by Rain boosted specs Pump. I don't run that ridiculous Icy Wind and HP Ghost Keldeo non-sense, simply because Icy Wind is fucking weak and HP Ghost doesn't do much to Jellicent anyways. I find that having Surf and Hydro Pump is definitely helpful when I know Surf can KO and don't wanna take the risk of it missing or using up one of the eight precious PP it has. Secret Sword is a given, gg Chansey, Blissey, Ferro, and friends. HP Ice for the Dragons like Salamence, DNite, Latios, etc.. Make sure to run an IV set of: 30/31/30/31/31/31 to ensure you have HP Ice and not sacrifice a precious Speed IV. Please have fun with this set and just fucking destroy everything in your path. If you misuse it and it doesn't work good for you, that's on you, not me.