After hearing someone else's version of Asgore's theme I decided to make my own out of fun. This is about 4 hours worth of work so far. I may or may not continue this in the future or expand it to a full rearrange.
Enjoy!
Please contact me if you would like to use this in a project. We can discuss the details.
* Cover / remake of a third-party piece.
Excercise caution when using it, refer to author comments / contact the author for details.