The left one has lower attack

Aside from that, Pianus has all the typical attacks you'd expect: a big beam dealing 3,700~ (left) or 4,700~ (right), avoidable 10t weights that drop down dealing the same damage as the beam and of course, HP 1/MP 1. It also casts physical and magic immunity. (far too frequently if you ask me...) It can also dispel and lock skills, though the right side will only do this if someone is standing behind it (in it). If you've been wondering what I mean by left and right, two Pianus (Pianii?) can spawn in the same map, obviously on the left and right side. Though similar, they have several differences: The left one has lower attack, hp and defence. But dispels and locks skills far far more often. It also gives around 300,000 less experience than the right one.