I don't know if I should ask this here or in https://musicfans.stackexchange.com . I'm also not sure if the wording of my question is fine. So feel free to suggest corrections.
I tend to like ending themes in series, cartoons, animes, games etc more than the rest of the tracks. I might be wrong, but it seems to me they usually have the same feel. I wonder if it has a well understood musical theory behind it. Does it exist?
Dungeons and dragons cartoon ending:
Jaspion tokusatsu ending:
Yuyu Hakusho anime first ending -