I really wonder how do people see "so many plot holes"? Because I can see ONLY TWO and even they are relative.
A plot hole is something that causes the plot 或者 a part of the plot to not add up 或者 to not make sense. These two 电影院 don't have such, as all 你 have to do is pay attention to what is 说 and how it is said, and at some points to use common sense.
1.) The cub's 设计 and the ceremony.
But officially that is not a plot hole. As 迪士尼 has made it official it is "Fluffy"/Kiara in the movie universe. As in introduced no one else in the 电影院 - basically we just have to accept that...