According to your pond's make-up, you can do a cool water species pond if it is shaded, deep, or cool spring or well fed, and doesn't boil in summer.
A warm water pond kinda limits you to bream, Largemouth, and Cats...and some different hybrids that are stocked.
But you still need to stock the minnows or baitfish and let the spawn twice before adding the predators.
Most hybrids won't produce offspring, but they can if a parent species is added...Saugeye can produce offspring with a parent Walleye or Sauger....that's why they are not stocked in brood systems...they can degrade the pure blood lines.
Other hybrids have been proven to do the same.