The point that I was making is that it has the potential to work with the Pachirisu/Shaymin engine - I most certainly was not suggesting that you slot a bottom-heavy Hydreigon line into a Zekrom deck and call it competitive. Any sort of inference that I was is misguided.
One should be running 4 DCE already in any form of Hydreigon list. It has the potential to use the Generate-Wind Engine to chain Hydreigons. It has an inherent weakness to Donphan by which Hydreigon is 2HKO'd and can only return with a 3HKO, assuming no Special Darks. Logically, thus, one would want to run a Donphan counter that can turn the tables on Donphan - Tornadus is the current splashable one which also makes great use of Double Colorless Energies. There is no reason to not run at least a singular copy in your list.
Don't try and be condescending if you have no idea what you're on about. There are other ways to use cards than the ways which you've rote-learned from the forums.
That being said I don't see Feraligatr as much of a contender for the sidekick of Hydreigon. If you're going to run a more direct approach than Generate-Wind then you'll not want to even run the Shaymin, so Emboar is vastly better in that regard.
It's going to come down to H/P/S/T vs H/E/T (THE.dek?). Obviously the former is more explosive but the latter is more sustainable and the question will end up being something along the lines of:
"Which is more important?"
Only time will tell.
P.S. Heh. Just realised how much innuendo there is behind "Generate-Wind".