Adding/editing music is definitely possible and not particularly difficult. I've learned very quickly that the hard part of a pokemon ROM hack isn't the hacking, it's the creative side. Making sprites/movesets/music/plot is so much more ridiculously time consuming than putting any of it in the game.
Like an equivalent of the Unknowns?
And they could literally be just ASCII smilies of different colors.
Haha I like it. Fewer than 28 of them, but they each have an evolution to make them actually useful in some way.
On that note, I'd like to avoid any useless mons. The unowns were neat, but there was no way to make them useful, even if you happened to get one with a strong Secret Power.
I think I like the idea that, say the Pewter-City equivalent is a new fortress, and the Migrants are the guys running around outside the gates. The reason I think it would be cool to have them that early is because if they can all get a different elemental affiliation, then it provides some much needed type diversity to the early game. I'm not entirely decided on whether to keep them 2-stage evolutions or try to give them a third stage- on the one hand, a third stage would prolong their shelf life, but on the other hand I'd have to think up more names
Something to ponder at work today.
@GlyphGryph- that sprite is amazing- maybe make the final evolution look more skeletal/half immolated? I don't know, but if you're looking for a break from Boatmurdad I'd be interesting to see what you're imagining Perlihorn like.