Heartwarming / Little Nemo: Adventures in Slumberland

• The exhausted Nemo's heartfelt apology to King Morpheus, just after defeating the Nightmare King, and King Morpheus’ gently forgiving him and praising Nemo for his heroism, citing that he has become a true prince as a result.
  Nemo: Your Majesty, I broke my promise. I opened the forbidden door. I'm very sorry.
  King Morpheus: Hm. Your courage destroyed the Nightmare King and his evil kingdom is gone forever. (Nemo smiles before passing out in Morpheus's arms) Quite the prince you've become, my little Nemo.
• Just about all of the Nemo / Princess Camille moments qualify.
  Camille: Nemo?
  Nemo: Huh?
  Camille: Nemo... I had a wonderful time. Thank you, Nemo.
  Nemo: Uh, sure, I... I'm, uh... (Camille then moves in for a kiss. Nemo is taken by surprise at first, but then gives in to his feelings and the two kiss as the scene fades to white)