He's gonna swim with Dory!
Jaryth is downstairs yelling “Emo! Cars! Emo! Cars!” Mark replies “Which one? Nemo or Cars?” “Emo! Cars! Emo! Cars!” “You can only watch one at a time.” “Emo! Cars! Emo! He’s gonna swim with Dory!” In this instance “he” is Jaryth referring to himself. I guess he not only wants to watch “Emo” he wants to go swimming with Dory.