Good, but not great
I like the background of this picture. The colors really flow together and the colors in the sky complement each other nicely.
The actual pikachu, however, seems oddly simplistic compared to the smooth, rounded, soft style of the background. You have a soft, blurry bitmap background behind a hard, sharp vector main figure. Maybe it's just me, but it doesn't seem like the two style match too well together.
I suggest either making the background vector or making the pikachu more detaled.