Fighting type move tutor in Nexa town

[MLdarknightmare]

He doesn't work properly. I tried to teach Aura Sphere do Lucario and Delta Magmortar, but I was unable too, after that I went to the Move relearner which allowed me to relearn Aura Sphere (for both of them), this makes no sense to me. Same story for Delta Lopunny, but this time I tried to teach it HIgh Jump Kick, I went to the move relearner, same story as above.

[Chroma]

And idk if this is intentional, but Seismic Toss can't be taught to Chansey.