Why Lati@s needs relearned moves to be legal ?

[thibaultdidier]

I generated a Latios on PkHex, trying to imitate a legal one caught in Ultra Sun (Ultra Space Wilds, lvl 60), normally pokémons caught there shouldn't have relearned moves. However as the capture shows we can see that pkHex sent me an error message. Is this an error from PkHex or Lati@s (Yes for Latias it's the same) are exceptions to this rule?

Thank you in advance if you're able to enlighten me.

[Sabresite]

Hold CTRL and click the legality button. Paste the report.

[Kaphotics]

53 minutes ago, thibaultdidier said:

I generated a Latios on PkHex, trying to imitate a legal one

nice try

53 minutes ago, thibaultdidier said:

Is this an error from PkHex

lol no

click the relearn groupbox for it to tell you what it needs to be. certain encounters have relearnable moves.

[theSLAYER]

@thibaultdidier because the Latios and Latias was given re-learn moves in the game.
(the links above shows ones that I caught in-game, and their data)