There are a few tips you may want to consider when creating your own Devil Fruit.
- Start off by looking through the already created by other users and use that as a guideline.
- Chose between the three types of Devil Fruits.
- Paramecia and Zoan will more then likey allow you creation without a OP penalty. Be careful when choosing Logia do to its tendancy to be OP.
- Make sure that you avoid the OP Penalty and make your Devil Fruit abilities amatuer from the beginning.
- Be sure that the Devil Fruit has potential to help you grow and become stronger, don't make it too flat out.
- Look through your characters personality and history and see what would fit them best.
- After you've decided on your devil fruit, be sure to create your first 5-10 attack.