Oh, Noivern "training" seems to be bugged. The picture never disappears when you are done. lol
I have to update the game to the version that fixes that on here. But you can try and breed any other Pokémon and it should go away.
Thank you for the info!
One more thing, is full evolution currently implemented for any of the hybrids?
I believe Vulpix normally needs a fire stone and judging from the lack of sprites for most of the hybrid evolutions, they are not implemented yet?