Thank you for the comments! I thought something royal but a bit more manly than wands and jewels suited him....
I even thought it would be fun to write a "backcard story" for him--something about a little boy prince in the Dream Castle surrounded by princess ponies telling him to behave himself and be careful with his toy sword, when all he wants to do is be a boy. He escapes the snobbish visiting aunt princesses (eyelash ponies) and goes outside to play. His sister Princess Sparkle invites him to a tea party with her friends, but that's no fun for a prince. Then he saves the day with his sword by chasing away the ants spoiling his sister's picnic!
I have been planning to add him to my sales thread, but just haven't gotten around to it yet. I was thinking of asking $25 for him and his accessories, including shipping within the U.S.