Using PKHeX 22.12.01 these Pokemon are marked as illegal even though I got them naturally in Pokemon Violet.
The reasons are:
Misdreavus: Invalid Marking: Cloudy Mark
Glalie: Unable to match an encounter from origin game
Haxorus: Invalid Marking: Rainy Mark
Yungoos: Unable to match an encounter from origin game
734 - Mangunior - 95101CEB3A9F.pk9
612 - Maxax - D4B30BAB4888.pk9
362 - Firnontor - EB8DF1CFFBBE.pk9
200 - Traunfugil - 2ACA69AC61B2.pk9