In case your royal is a pawn, it can be stalemate by being blocked!
Ahab Chess Gameplay Rules

Stalemate is only when you can't move any pieces at all. It's very unlikely that you'll be unable to move any pieces at any point in the game, but if somehow stalemate did occur, I think it would be a draw.

Well, if there were only ahabs left, that would be pretty crazy. To prevent that, we could have a bare piece rule, that if someone gets down to only one piece he automatically loses.

Hmmm…. That changes a lot of the strategy and concept of the game. Maybe that’s not a good idea. I don’t know
I was thinking about a stalemate for a pawn, when it was the royal. Who won?
I’m sorry, I don’t know what you mean. If we’re doing capture-the-royal, there’s no such thing as stalemate.