I love Feraligatr, and I was actually pretty intrigued to hear that it both got its ability and that its ability made it hit harder than Mega Gyara. As soon as I new that, I ran right over to the team builder, opened up the calc...and got nothing. Even with Feraligatr's bulk and lack of a Stealth Rock weakness, I can't seem to think of what this thing sets up on that (Mega) Gyarados doesn't do 10000x better. In fact, I can't think of anything Feraligatr really wants to set up on in OU at all. Heatran I guess, but even then it has to fear the burn. TTar too, I suppose. But other than that, Gyarados's Intimidate + Flying typing does it a lot of good in terms of setting up on stuff like Landorus and Keldeo. I'm certainly not saying Feraligatr is outclassed or that he shouldn't be used in OU. I'm just genuinely asking, what in the world does this thing set up on?
Also what moves do you think are best? At first I assumed Superpower for Ferrothorn, but I think Crunch being able to hit Slowbro, Mew, and stuff is also useful. Plus, lowering your attack stat is no fun.
I think Feraligatr's DD set is more likely to be played as a bit of a budget Gyarados (kind of like people saw Manectric vs Raikou in earlier XY), but Feraligatr has one other option: SD.
With Swords Dance and a LO backing it, Feraligatr can run over bulkier teams. Even without STAB, Crunch still proves decent neutral coverage
+2 252+ Atk Life Orb Sheer Force Feraligatr Crunch vs. 252 HP / 88+ Def Ferrothorn: 187-221 (53.1 - 62.7%) -- guaranteed 2HKO after Leftovers recovery
And Aqua Jet still hits decently hard (+1 used for similar boost comparison)
+1 252+ Atk Life Orb Feraligatr Aqua Jet vs. 0 HP / 0 Def Mew: 121-144 (35.4 - 42.2%) -- guaranteed 3HKO
252+ Atk Choice Band Huge Power Azumarill Aqua Jet vs. 0 HP / 0 Def Mew: 120-142 (35.1 - 41.6%) -- guaranteed 3HKO
LO and Sheer Force gives Feraligatr the same level of power as an Azumarill at the same boost level (CB being a +1). DD and higher speed also means it's less dependent on Aqua Jet against faster teams, and on the physical side it's actually slightly bulkier than Azumarill, who finds a few chances to set up w/ Belly Drum cutting its HP (though obviously for a more obscene boost).
252 Atk Aerilate Mega Pinsir Return vs. 0 HP / 0 Def Azumarill: 298-352 (87.3 - 103.2%) -- 18.8% chance to OHKO
252 Atk Aerilate Mega Pinsir Return vs. 0 HP / 0 Def Feraligatr: 247-292 (79.4 - 93.8%) -- guaranteed 2HKO
Feraligatr's 78 speed can't outpace Base 145 at +1, so the next benchmark is Lopunny/Mega Manectric, which would entail 220 EV's Jolly (271 Speed * 1.5 = 406.5), leaving 36 HP or Defense if you go Jolly. Adamant hits 255 max, so I'd say relevant there is 241, which at +1 outpaces Base 115 (Houndoom, Starmie, Raikou) and leaves 60 HP.
Also, as far as Ferrothorn: is there any other target for Superpower? Because if not
0- SpA Life Orb Sheer Force Feraligatr Focus Blast vs. 252 HP / 168 SpD Ferrothorn: 164-195 (46.5 - 55.3%) -- 68% chance to 2HKO after Stealth Rock and Leftovers recovery
And doesn't drop your offenses or defenses.