This is how Ryan realises that he's part cat goes in Ryan and the Cat Returns.
Matau T. Monkey: Master Ryan? You think Haru can't marry the prince?
Ryan F-Freeman: I think so. Haru and I are not cats. I'll go see her.
[Ryan goes to see Haru, who is dress in a ballgown]
Matau T. Monkey: Wow.
The Cat King: Well, Ryan. I hope you love the wedding.
Ryan F-Freeman: Yeah. I think the prince is busy.
Matau T. Monkey: Ok, Master Ryan. Tell the Cat King about you think.
Ryan F-Freeman: Look. I think it's big misunderstanding. Haru can't get married and like me, I'm not a cat. And she is not as well.
Matau T. Monkey: I think he has a point so there is nothing to worry about.
The Cat King: And one thing, Prince Ryan. You're half cat already.
Ryan F-Freeman: Huh? [looks to see his hands are turned into cat paws] My hands.. [feels his face and cat ears] Whoa. I think Haru can point that out.
[Ryan walks to Haru and saw his reflection on the mirrior to see
Ryan F-Freeman: Wow. Fancy that. You think I'm ok, Haru?
Haru Yoshioka: Yes, Ryan. You're a cat.
Ryan F-Freeman: So is you.
Haru Yoshioka: I am? [looks at Ryan and her reflection then screams]
Ryan F-Freeman: [covers his cat ears] Primus! That was very loud.
Matau T. Monkey: Haru! Please! You got to keep it together!
Sci-Ryan: I heared a scream.
Haru Yoshioka: What... does the rest of Ryan look like?
Matau T. Monkey: Ummm. Like himself. Only not him. He got a cat nose.
Sci-Ryan: A cat nose? [tabs his nose with his paw. Panics and is about to scream]
Ryan F-Freeman: [covers Sci-Ryan's mouth] Are you going to scream like Haru?
Sci-Ryan: [moves Ryan's paw off his mouth] No, Ryan. What happend to me?
Ryan F-Freeman: I think it's when we stay at the cat kingdom, I realised that I'm a cat. And now, you are too.
Sci-Ryan: Huh? [looks in a mirror] Wow. Look at that. I'm a cat. [feels his face] Huh? AAAAAAAHHHHHHH!!!!!!!! What happend to me!?
Haru Yoshioka: Wow. Sci-Ryan did remember my line.