Ideal team (viability aside :P):
1.
He's Tyranitar. Self-explanatory.
2.
Wall+Drain+Cool typing+Good design=Best grass type.
3.
I like the genies, and he's definitely the best, not least because of his interactions with Tyranitar.
4.
Not gonna lie, I like him mostly because of his monstrous Sp. Att. The moveset helps too, and there's something inherently kind of amusing about a living chandelier.
5.
Just adorable. Let teh jelly roll!
6.
One of the few bug types I like. Thunder and Bug Buzz go so well together.
Overall, Gen 5 had a ton of amazing pokemon. My favorite since 2.