I want to create an Endeavor pet but cant find it in the create a pet section ,is there a special way that these pets have to be made ?

I think you can make them during Masquerade somehow? (I'm not sure.) But right now, there is no way to make a brand new endeavor. You have to make a pet and then turn it into an endeavor using an item (elixir).

Thank you

yes, you can make endeavors and cadogres during masquerade in february for 50,000 sp at blackmoon corp.