From the Super Mario Wiki
Kamek (Green) is a green-robed clone of Kamek created to assist him along with two other clones in his third and final battle in Mario & Luigi: Dream Team. Kamek (Green) wears a green cap and robe with a green aura with magic squares rising from it.
This Kamek clone can raise the POW, DEF or SPEED of Kamek or the other clones. When in battle, he will add to Kamek's magic ring attack by having a green ring stack with Kamek and the other clones' own rings, his being the third from the top. Kamek (Green) is the second to close up his ring, having it grow twice with pauses in between, then closing at a smooth yet fast pace. Mario must avoid this attack by jumping over the ring just as it's about to close. Out of the three clones, Kamek (Green) has the highest HP.