You can, like, totally use pokemon as currency right now. I'm trying to fill up my living pokedex and rare pokemon and legendaries are becoming extremely hard to come by. If you want a commission, but don't want to pay for it, you can totally offer up any pokemon via comment or message and we can arrange something. Be aware that I do have a large chunk of my pokedex filled out (like, I have all of Gen 1 except Mew), so I can deny some pokemon. That doesn't mean not to ask by any means! ^^;
The rarity and amount of pokemon sent to me will determine what kind of commission(s) you will get. For example, if you get me a Mew, I will draw a fullbody colored whatever. A zubat will get you something special. This offer is not limited to legendaries! You can seriously offer any pokemon you want (Zubat included).
So yeah, if you have a lot of Pokemon just gathering dust in your boxes, I will gladly take them off your hands. :>