Quite a lot, and the official doesn't seem to pay much attention to it ... the name of the monster will change at any time. In the tenth season, there are some well-known monsters, such as scare monster, bite monster, sesame fox, crazy monster (originally called curse monster ...), magnetic monster (the one who loves the flower temple), fever monster and flying eagle monster.
In previous seasons, there were sawtooth monsters (like fans of Flower Temple), red dragons, angry sharks, fish monsters ... these monsters had a high appearance rate. If you don't like them, I suggest you go to the Happy Baby Monster to find them.