I know everyone's saying to head west, but don't think that's your only option. If you're feeling more adventurous, you could always try catching the fairy and heading out to Kanto instead.

[Riku smirks. Why yes, there might be some personal bias involved here. Kanto's awesome and deserves more love.

It also means he won't be stuck in the dreaded Violet City.

...yep, totally biased.]

Anyway, team building... You've already got people talking about balance, but I think it's important to look past typing and think about the individual strengths of the Pokémon. Are they fast? Slow? Sturdy? Frail? Personally, I like to get as much variety as possible, but I doubt you'll want to have a team of fifty...

[Yeah, he's... kinda silly in that regard.]