I think another big reason for Pinkie being so used is that the animators can break the rules a lot with her.
I get this feeling too. I don't know why they keep forgetting that the other ponies can be cartoonish and funny too ("The Ticket Master" for example. Actually, I find Twilight is far more fun when she's being cartoonish).
@Moe No, I was thinking more like the battles including representations of their beliefs and weaknesses based on their neurosis or something.
What, you don't think Twilight would be upset that her Beyblade isn't strong enough and put all her scientific genius into building a battle top to shatter the heavens?
Like you know how there's blunt damage and piercing damage in some RPG's? Well stuff like that but related to different mental states.
Like, RD is egotistical, so enemies that use attacks that counteract Egotism would deal more damage to her.
Yeah, I get what yer talking about. The trick would be balancing it with playability. I've seen a lot of
RP Gs (mostly computer ones) that try to be too nuanced, and wind up just being unplayable. The scenario you suggest, for example, has the potential to create a lot of
Useless Useful Spells if not balanced properly.