Gyarados @ Leftovers
Adamant / Intimidate
EVs - 212 HP, 8 Att, 168 Def, 120 Spd
~Waterfall
~Earthquake
~Dragon Dance
~Taunt
Since you're pulling Aqua Jet, Gyarados would be a nice switch-in. Intimidate kills your Attack stat (and Aqua Jet will barely do anything to Gyara anyway), and I can just DD up while you either spam Jet or switch out.
- Gyarados is nothing without Dragon Dance, seriously. One DD gets it up to 424 Attack and 342 Speed, so it can outrun and outpower a good number of other Pokes. It can Taunt a lot of critters that are just plain annoying (Breloom, Skarmory, Donphan, other Physical Walls). Waterfall for a strong STAB attack and 20% chance of flinch, and Earthquake for the critters Gyarados fears the most: Electrics.