This is Eros :) He doesn't look like this now because he's got a nasty case of fin rot, I won't spawn him until he is in 100% health however.
Also.. he doesn't have popeye in these pictures.. its the angle and he's a little bug eyed anyways :)
He's a blue butterfly and I would cross him with another blue female or a marble female who carries blue. I would get butterflies and marbles and solids, HM and DBT for tail types.
I do like the Black Dragon, I could also do an HM version of that but I like the HMPK better.