Uhh...Well, on all my modz, you can catch every Pokemon. Traded Pokemon evolves differently...The game suppose to be more difficult than the original, tho.
Also, Skitty is available. Delcatty also has its very own moveset, too.
Just pick one'em and try it out. If you're not sure which you wanna play or just have question on which Pokemon are located, just ask me.