I'll try to respond to as many of you as possible o.o
Ash Borer with EQ Latios and HP Ground Focus Sash Genesect
I have definitely considered using EQ Latios in the past. If you are running Latios with lead Deoxys-S or Deoxys-D, consider using a spread of 40 Atk / 216 SAtk / 252 Spd to always 2HKO 252 HP Tyranitar with SR and Spikes on the field. Although you can 2 shot specially defensive Heatran with Surf on some sets, the appeal of EQ Latios is that you can remove Heatran right from the game and the opponent can't play conservatively with it to prevent the 2HKO and then bring it out on your sweeper (which happens with Surf Latios).
I have mixed feeling about HP Ground. I know it can sell Heatran very well, but I always felt like you sacrificed too much. Your fourth moveslot is dedicated to a base 60 power move that can only hit Heatran hard. At least with the other attacks one could put in that slot for expert belt Genesect you retain a pretty good base power move that also preserves your coverage against water types. It definitely has its niche though and I will add it to the OP.
Also, specially defensive Heatran is probably one of the hardest pokemon to lure in because it spams Protect a lot in order to gain Leftovers recovery. One mispredict on Protect means your plan is over; so it is very high risk, high reward.
sidakarya with SubPunch Mawile and Nasty Plot Dazzling Gleam Togekiss
Unfortunately, SubPunch Mawile isn't the most "stealthy" of lures. First, the use of Substitute is a strong indication that you might have Focus Punch. SubSD is certainly plausible, but Mawile having Focus Punch will definitely be in the Heatran user's mind. Second, you have to tread very carefully when using Focus Punch, because Heatran loves to spam Protect for HP recovery. On a good day you could pull it off, you just have to bear in mind that certain Steel-types and Poison types will be more annoying to you.
FYI Mawile also learns Brick Brick, which still hits Heatran hard while giving you the freedom to run something else other than Substitute in the first slot. If you really felt like it, you could run an SD set with max speed (neutral nature) and Brick Break to lure out Heatran. Easier to sell and it still has the potential to sweep offensive teams with Sucker Punch.
That Togekiss set looks pretty good though.
Small Comments:
TC Terra You don't need Bullet Seed if you wanted to cause severe damage to Rotom-W. A much better idea would be to have enough speed to outrun the Rotom-W on the analysis (220 speed @ 136 Spe) and use Pin Missile to 2HKO. You gain another powerful STAB this way that can beat Psychic types that resist Fighting. Also consider Close Combat > Focus Punch with more speed.
Kadabrium Some of these are sets use moves that are non-standard, which is how they bring out and beat their counters. Some don't involve an unusual change in coverage at all, such as Expert Belt Genesect. Rather than using an unexpected move, it beats the opponent by making them believe it is locked into a resisted "standard-coverage" move.
BlackSIlk90 Go to the "Ask a Simple Question, Get a Simple Answer" Thread. This isn't the place to ask those types of questions >.<
alexwolf Interesting set. U-turn / Quick Attack is a luxury that is hard to give up but I suppose Final Gambit is good on bird teams and U-turn is not necessary. Kinda sucks you can't pull it out mid-game because of SR and recoil from Brave Bird or Double Edge though. Also consider that it can block Defog if you absolutely needed to get damage done + keep hazards down.