I love how you say this. I've always felt ad for poor castform, spinda, and whatnot, being excellent designs, ad getting left in the dust while crummy designs like Gengar get the glory.
The thing is, that it requirs work and lots of it. If the goal is to win, why not take the standard UU team and get all the pokemo in trade. Instead of waste time coming up and breeding your own pokemon, where you get the same result either way. A win.
Personally, I love UU and don't like pokemon like Weavile and Gengar, but the sad thing, is that its very hard to devote the time and effort to something that difficult. I do wish that people would try new things and experiment with all sorts of new pokemon. I know the topic is UU, but the sme thing is happening in every Tier.
My friend came up with a very good way to use perhaps one of the worst fully evolved pokemon: Spinda.
I can't come up with the full moveset, as he's never shown it to me, aside from a shoddy battle, so I'll try as best as I can.
Spinda@Choie Scarf
Jolly (just a guess)
252 Speed...whatever (another guess)
~Trick
~etc.
~etc.
~etc.
Sorry for the vagueness. I'll get it at one point But you get the point. Trick-da. A better Trick pokemon, would be rotom or Alakazam, but the fun part is seeing your opponents shock and then saying: "Hahaha. I totally fucked your best wall with Spinda!" Its spinda man! ha a purpose. OMFG!!!
Just an example. Hope I made some sense. I'm kind of bad at typing to veiw my point.