In most One Piece canon, a person can't eat multiple devil fruits due to the risk of exploding. However, in fanfiction, the rules can be bent. Some fanfictions might allow Luffy to eat multiple devil fruits by creating special circumstances or new powers that counteract the normal limitations. For example, a fanfiction could introduce a powerful magic or a unique ability that enables Luffy to safely consume and control the powers of more than one devil fruit.
There were more than 100 types of demon fruits in One Piece. Some of them could only be eaten under certain conditions, while others could be eaten in multiple sets. For example, Domineering was a special ability that could protect the wielder from being hurt by the Demon Fruit's ability, while Demon Wind Kick was a special ability that could attack enemies by flying.
There were many ways to eat the fruits of the Northeastern girls. First of all, it could be directly peeled and eaten. After peeling, it was best to wash it with water before eating. Secondly, he could add an appropriate amount of girl fruit when cooking the porridge. It could also be made into sugar. The girl fruit could be peeled, washed, and dried. Then, it could be marinated in a container with a layer of girl fruit and a layer of white sugar for 2-3 days. In addition, the girl fruit could also be used to make fruit salad. It could be mixed with some vegetables such as small tomatoes, lettuce, etc., and mixed with salad dressing. He could also stir-fry the girl fruit with diced meat, prepare some red and green chili cubes and diced carrots, split the girl fruit into two halves from the middle, stir-fry the diced meat, add the red and green chili cubes, diced carrots, and the girl fruit, stir-fry until it was cooked, and finally sprinkle salt and chives. Girls had the effects of nourishing the kidney, strengthening the yang, caring for the liver, and preventing diabetes.
I'm not sure exactly, but there are quite a few. You might have to check with the official publisher or dedicated manga databases for an accurate count.
The Fruits Basket manga consists of 23 volumes. It's a well-known and beloved series. Each volume contributes to the rich story and character development.