DonKarasuMan
gnossiennes
I think it would be easy enough to remake them without losing the original sounds too much; I mean if they're midi files then all they have to do is rewrite them with newer midi software and possibly tweak them a bit.
If they updated them then they could also alter the cries of pokemon like caterpie/goldeen and actually make them sound different.
But then the cries lose character. The cries have become so classic that it's hard imagining them outside of their 8-bit manifestations, especially those that aren't melodic at all and the pitch of the cry is meaningless.
Also, you can't really remix a Snorlax cry :/