You copied and pasted some stuff together. Woo hoo.
If you made the two backsprites, then I should crit those. They have no outlines, and very little shading. They also use the default paint colors, which is a no.
Okay, so maybe they're not the default colors. They're still very bright and contrasting, which isn't a good thing. And little shading/no outlining is always bad when you put it with things that do have shading and outlining. Either change the sprites you made to look like Pokemon sprites, or change the Pokemon sprites to look like the sprites you made. Mixing styles turns out badly.
I know I'm hilarious. I don't need you to tell me that.