Figured I'd post on how to improve it...
Firstly, the background.
Do not rush.
It doesn't matter how much of a hurry you're in, it'll always be there tomorrow (unless the world blows up O.O but we won't go into that). So, take a bit more time, make things more accurate. I can tell you're doing this in MS Paint, but just take the time to shade things, and not have just blue sky and green grass kinda thing.
Secondly, make sure you have the pokemon positioned correctly. Like DF said, the Groudon's feet aren't touching the ground.
And also, don't leave excess background parts on the sprites after you delete the background. That also makes it seem very rushed. x.x
Thirdly, text bubbles.
You have to admit, it looks kind of dumb just having text float there. =\
Get the line tool, 1px, black, hold **** and draw some straight lines to form a text bubble/box of some sort, then fill it with white.
Finally, the story line/plot/what the pokemon did/whatever you want to call it.
Honestly, the plot was stupid, and not funny (in my opinion, anyway). Next time, try to be a bit more creative. ;)
Sorry for sounding so harsh before, but it was the truth, even if put in a somewhat mean way. ._.;