To be honest, I don't think it's really that good (other than my userbar :P).
The Pokéball picture is too big and rather pointless; it's rather annoying having to scroll through long signatures, and yours doesn't really help.
I've never been a fan of having statistics in your signature (most of the time, they're just made up anyway), and the "Pokémon RULES!!!!!!" is unnecessary, not to mention overusing capital letters and exclamation marks makes you look like a noob.
Just don't take my criticism too harshly; I'm just trying to help.