Well, it looks nice but you could make it look much better :)
First, go for only one focal point. You have, like, three; text and both Pokémon.
The sig has no flow at all, it looks a bit plain. Maybe you should go for another background and a light source.
Don’t go for cool effects on the background, a nice render and a text. Sigs aren’t that hard to make and once you know the basics. Look for some tuts, I’m sure you’ll be great at it in no time!
You just need practice, patience and imagination! Do you use Gimp? Because if so I can give you some .xcf’s and maybe some tips :)
Keep it up!