Heart Swap
Aqua Ring
Encore
Transform
Metal Sound
Heart Swap is not broken, on the simple basis that it is less likely to be used for anything more than a gimmick. While the ability to abuse it seems to be there, the simple nature is that you simply switch your boosts/drops with the opponent. Basically, anyone who believes that Draco Meteor could cause the ultimate hax is forgetting that the drop would hit -2, and then you'd either switch the drop or fight with the drop. By the time you hit -6, Krilowatt will probably be on its last legs, as you've been using it as a sweeper. Alternatively, you'd switch the -2 drop and then use it again, meaning you're back to where you started, and Heart Swap is useless, as each Pkmn has a -2 SpAtk drop, unless the other one used a boosting move.
Aqua Ring is again, a gimmick. We cannot gain any advantages by healing, as whereas Stallrain is viable and very usable, it relies on a weather effect to be so. Meanwhile, Stallowatt will need Aqua Ring to be any use, leaving us one attacking move, as well as also having a much nastier weakness - that of Ground moves, specifically EQ. That will break almost every Substitute in a single blow on all but from the weakest Pkmn, and Protect only works so many times. Eventually, you'd run out of HP, and have done nothing save potentially have prolonged Burn/Toxic damage.