Hm, awesome. Yeah, I managed to do pretty much all of it, by the wings' ruffled up parts couldn't be translated in lesser pixels for me. It's a fossil, btw, so I assume you'll be adding in the turtle, too?
I've replaced Kangaskhan with Tangrowth, and Drowzee and Hypno made room for Acidirt and Garghbin. I plan on inserting Shimama (electric Zebra.) and it's evo, replacing Venonat and Venomoth, Monmen and Erufuun, replacing Swinub and Piloswine, the monkey trio, replacing the Regis, and some others, too. Oh yes, Mr. Mole and his evo are replacing Ledyba and Ledian (good idea, they don't deserve to stay).
Funny, I just replaced Dr Fuji's overworld sprites with my new character, Jack of Hearts. :D