I'm sorry, but I will have to disagree with you on this one. If you used Sketch/Skew instead of just resizing it by hand the trainer would look much better. Double sized sprites are a way to look at the sprite at a higher magnification, allowing better crit. But usually they are posted in coordination with a normal sized sprite.
In short, if you use sketch skew, you can blow it up (How large you blow it up is your choice) but you may want to post a normal sized sprite as well as a regular sized sprite.
As for the sprites themselves, they're good (With the exception of the trainer sprite that was ruined by the resizing). I really can't tell whether they're fusions or recolors, mainly because of the fact that I haven't seen an overworld in ages, but I guess that would be good. Ehmeh. I may update this later with far better crit.