I stumbled on this by myself when spazzing like I norrmally do (hey, it's how I find all the codes). I checked on gamefaqs and there was no mention of this, so I'm going to post it.
on the left column hit ABCD to release Hitomi, who flies a rabbit (yeah, a rabbit).
On the right hit ABCD to release Diabloon, who flies one of those round looking ships.
on the left column hit ABCD to release Hitomi, who flies a rabbit (yeah, a rabbit).
On the right hit ABCD to release Diabloon, who flies one of those round looking ships.