You can bread Farfetch'd, too. -_-;; This is getting a bit morbid...*looks guiltily at Pokemon Gold* Sorry, you two...
Best Johto Starter could be good, and just do the other starter polls (minus Kanto) over again, but reorganized by region, or something. There was that other poll said awhile back...best sidekick, or something, for Ash (like Misty, Brock, Tracey, May, Max...maybe Todd). That could work.
Or, for a different poll, you could do the alternate starters: Pikachu (Yellow), Eevee (technically Yellow, XD), Espeon/Umbreon (Colosseum), Plusle/Minun (Ranger)...am I missing any, here? Or, if Espeon, Umbreon, Plusle, and Minun don't count, you could do a weekend poll of Pikachu versus Eevee or something.
There's also best region (Kanto, Johto, Hoenn, Sinnoh, Orre, Fiore), best generation (obvious), best island chain (Orange VS Sevii), best Elite Four champion (rival, Lance, Steven, whoever is the Sinnoh champion), best spin-off RPG-ish-y game (Colosseum/XD, Ranger, Dungeon, whatever else applies)...
You could even induce the Eon war by best Eevee evolution. X3
Do you want any more ideas? I'm good at thinking up random polls if you have absolutely none...-_-;; They may not be good, but if you need a poll...I can give you a poll! TWO FOR THE PRICE OF ONE! *brick'd*