Yeah, I won't use them...others might, they are just there to look pretty basically. Anything else is fair game...basically anything breedable.
there to look pretty? is that all you think they're there for? Ive had quite a bit of success with Suicune myself, and Heatran is incredible. Not even mentioning the Therians. But, they arent good enough to really thrive in Ubers, so they get put into OU.