|"That's not what happened at all!"
This topic is considered non-canon because it never appeared in the film.
Garmadon's favorite weapon is his club, an ornate piece that matches his armor. He knows he looks good when he holds it up in the air and proclaims victory (which he rarely gets to do) or vows vengeance after a defeat (which he does a lot). The IT guys are looking into installing a GPS in the club, for when Garmadon misplaces it.