Well, we ain't got any zombies yet, dood. (Or Prinnies for that matter. )
There's Zyx (like Xyz, but upside-down - from the ceiling, in other words). There's Alexis (past), who is, of course, weaker and younger.
There's... a TON of "Heartless", apparently? (Maybe Heartful?) This includes Emerald Jazz, Saffron Threnody, Xanthic Requiem, Ebony Caprice, Amber Foxtrot, Jasper Crescendo, Rainbow Disco, and Rusty Octave...