I really like the twist on the theme and sort ... reverse pokemon-ing! Your world building even just on the page write-up is appreciated. I just want to enjoy my kingdom and all these pesky heroes keep showing up.
It took me a while to get into the swing of things. I applaud all the effort that must have gone into building out the systems, but I think if you teased some of that out in pieces during a built-int tutorial I'd be better prepared to take on the challenge of retirement.
The overall design and aesthetic work really well. I think you should be very proud of this project.