my lead
Garchomp @ Life Orb
Ability: Rough Skin
Nature: Jolly
IVs: 31/31/19/19/31/31
EVs: 4 HP / 252 Atk / 252 Spe
-Earthquake
-Dragon Claw
-Rock Slide
-Protect
my backup
Nemo (Gyarados) @ Gyaradosite
Ability: Intimidate -> Mold Breaker
Nature: Adamant
IVs: 31/31/31/X/31/31 (well actually one defensive IV is missing but I forgot to check and my 3DS is turned off rn, will correct whenever)
EVs: 252 Atk / 4 Def / 252 Spe
-Waterfall
-Earthquake
-Ice Fang
-Dragon Dance
AI lead:
Charizard @ Choice Scarf
Ability: Blaze
Nature: Mild (assuming it's the AI's Charizard3)
IVs: 31/31/31/31/31/31 I guess
EVs: 170 Atk / 170 SpA / 170 Spe (again, assuming it's Charizard3)
-Heat Wave
-Air Slash
-Rock Slide
-Crunch
AI backup:
Raikou @ Air Balloon
Ability: Pressure
Nature: Timid (assuming it's Raikou3)
IVs: 31/31/31/31/31/31 I guess
EVs: 252 SpA / 252 Spe (assuming Raikou3)
-Thunderbolt
-Shadow Ball
-Volt Switch (lol useless for a backup)
-Protect
Garchomp was still a no-brainer for Earthquake spam and breaking down opponents early-game. For my backup, I wanted a hard-hitting mega that was not weak to ice and difficult to take down, and then it dawned to me: Mega Gyarados. Stupid attacking power and stupid bulk bolstered by Intimidate, only a little slow but that could be remedied by Dragon Dance. I'm naturally very cautious about using setup moves in Doubles, but considering Gyarados's bulk and his juggling with defensive typings I figured he could pull it off. I needed a little practice to learn to only set up if it was really, really safe (this streak was my second attempt with Gyarados, I lost a previous one in the early 20s because I set up on an Eelektross. I would have survived its attack, but I was double targeted, so ya.) As for its moveset: Waterfall, (Mold Breaker) Earthquake, and Dragon Dance are mandatory; the last slot was a tossup between Ice Fang, Return, and Protect. I didn't have room for Protect because I needed something to hit Grass-types and flying Dragons, and considering I would be using the move in this slot solely for these opponents, I saw no reason to choose Return over Ice Fang.
My partners are pretty alright. Charizard's Scarf eases prediction massively, and it usually locks itself into Heat Wave. Occasionally it chooses a different move, but Air Slash and Crunch still work out pretty well at that very moment (also considering he usually chooses Crunch against Psychics/Hex Maniacs :p); however, you're gonna have a bad time if he picks Rock Slide, because it's extremely weak, not to mention Heat Wave would still have been better in most of these situations in terms of raw damage output. As far as AI partners go, I think Charizard is one of the more reliable ones. Raikou is a little worse, he uses Protect on completely random occasions, and can and will use it even if it means the death of his partner >.> he also tends to steal kills from his partner, but that's something all AI partners do as far as I've heard. However, he hits pretty hard and knows his type chart, so he's still pretty usable.