They could make 6 characters in all the time it would take to make Pyron. Almost every single thing he does would require a new 3D model. Pyron, like most DSers don't just move, they transform and morph and Pyron is the worst. Plus, doesn't help that he aint that poplar among the group.
"The OFFICIAL, Who's Your Favorite Darkstalkers Character poll"
Ranks pretty damn low
People especially hate the fact he has a bad case of SNK Boss Syndrome...and he's not a DS.