If zapdos's dream world ability ever does get released he'd work better in the pikachu or jolteon slot. Mainly the pikachu one though.
Why wait for Zapdos when you can use Motor Drive Emolga?
So, since we are sharing all sorts of pretty gimmicky combos, I'll share a few silly ones I was theorymonning around yesterday. No specific move sets or EVs are mentioned due to both laziness and that the movesets could vary heavily from team to team beyond the essential pieces.
Bulky Thundurus +
Choice Scarf Serene Grace Rock Slide Blissey
There are only two fully evolved Pokemon in the game that can abuse the wonder of Serene Grace Rock Slide, the other being dunsparce. Out of the two, Blissey is faster. With maximum investment, Blissey is sadly just one point shy of speed tieing with Terrakion and friends, but at the very least, you can outrun key threats like Volcarona, Garchomp, and Zapdos. With Blissey's Rock Slides, there is only a 16% chance that both opponents will attack! Thundurus comes in to lessen those chances even more with Swagger and Thunder Wave, provide good defensive synergy alongside Blissey, and slow down those speed mongrels like Latios and Terrakion. I suppose you can opt out for the Choice Scarf all together and rely strictly on Thunder Wave to ensure Blissey moves first, but there are a lot of teams preparing for Thundurus nowadays, making it a littler more unreliable. Good team mates for a core like this might include something like Hitmontop or Metagross to stomp Terrakion into the ground.
Terrakion +
Skill Swap Meloetta
This is not a core for regular VGC play, it's designed for use in the All Star cup going on in Japan. This carries on almost the same concept as the last core, but this time, you can have cool defensive and offensive synergy thanks to Meloetta! Skill Swapping to Terrakion not only restores Terrakion to his former glory of hax king in VGC 2011, but it could also make your opponent reluctant to attack you with Dark-type attacks when you could be carrying Relic Song. From there, it's a simple matter of spamming Rock Slide and Hyper Voice until the opponent's down. What's best is that this core doesn't rely on Skill Swap at all to be effective so it might actually be viable! A Chansey or Blissey could work in Meloetta's place, but I don't like the look of having two fighting weak Pokemon out at the same time with Hitmontop and enemy Terrakion everywhere.
Mantine +
Life Orb Seismitoad
Again, not really a VGC core, but a core designed for the Beginning Cup which may just become our VGC 2013 rule set. Mantine and Seismitoad just happen to be two water types both with Water Absorb that share great defensive synergy. Mantine can set up Tail Wind or Icy Wind opponents to give Seisitoad the speed boost it so desperately needs. After that, you can spam surf and keep each partner healthy, stopping periodically to Earth Power Electric-types and Air Slash Grass-types.
If Mantine actually turns out to be viable in a metagame like the beginning cup, I can die a happy man...