So you get the hang of it, I will post an example, which will be "The Lion King", only with Water-type Pokemon in an (at least somewhat) aquatic environment.
here it goes
Adult Lions(including Simba and Nala after they meet again, along with Mufasa and Scar): Empoleon
Teenage Simba/Nala (prior to meeting again): Prinplup
Young Simba/Nala: Piplup
Other animals: Random Water-Type Pokemon