Zyn was created when their creator Ray heard about Noms and thought it would be a good idea to make one. Unfortunately Ray is a bit clumsy and when trying to make Zyn a more sweet themed Nom they accidentally knocked over bitter ingredients into the mix. But Ray is a strong believer that everything happens for a reason so they just decided to go in the direction of making a bitter Nom instead of a sweet Nom and that's how Zyn was made and why he is based of a lime.