Looks to me like he modified Ike's SpecialN. I was in the middle of doing it, but his came out better, so I stopped.
By the way, do you think Firmiana Branch should be his Side-B? I think it might be better as a Dash Attack, since it would look kind of weird in the air (can you give a dash attack these sort of special properties? I think you can...). I was thinking to instead give him the Sword Pogo Stance as his Side-B, and make Meditate his Down-B. Both of these moves could be 'stances' that let him flow into other possible moves (Bounce, roll off the sword, spin attack, heal, teleport...). Besides, having a crouch that restores health is kind of a bit extreme for a basic motion technique, don't you think?