Did You Ever Think How Weird Some stuff Would Be Swapped? Here are some examples:
Here is Mario's Theme.https://www.youtube.com/watch?v=UEannNh8ihA
Here is Sonic's Theme.https://www.youtube.com/watch?v=uhscMsBhNhw
Here is Papyrus's Fight Theme.https://www.youtube.com/watch?v=c5daGZ96QGU&list=PLpJl5XaLHtLX-pDk4kctGxtF4nq6BIyjg&index=100
Here is Sans's Fight Theme.https://www.youtube.com/watch?v=zdeZwAk6ULE&list=PLpJl5XaLHtLX-pDk4kctGxtF4nq6BIyjg&index=24
See?