Jean Couronne XIV

Jean Couronne XIV is the FM-ian partner of Crown. When the two EM Wave Change, they become Crown Thunder.

MegaMan Star Force
Jean appears EM Wave Changed in the junkyard with Crown and challenges MegaMan to a battle.

MegaMan Star Force (anime)
Jean and Crown haunt an abandoned amusement park. They are seemingly invincible because no attacks could hurt them but it is revealed that striking the amusement park would cause damage to him because Jean's soul was linked to it.

Crown can later take on Jean's form while traveling in the human world but has an arrow through his head.