Do we have a script that we can attach to an enemy that, when Link collides with them, causes Link to lose a random number of rupees in a circle around him? That he has to rush to pick up or they disappear (relatively quickly)? That said enemy is also attracted to and will try to pick them up, then flee (perhaps to a set point /mousehole/etc)? Thieves, rats, rupee-likes, and that sort of thing would do well with this.
Bonus if the rupees bounce and interact with solid objects/water/etc.