Pokemon Sword/Shield Mystery Gift editing

[ATEMVEGETA]

I am trying to edit a Mystery Gift of a Shield save file but the only thing I can see inside PKHex about Mystery Gifts is this block "*Object KMysteryGift" which contains (I guess) the obtained events in Hex form:

 

I am trying to find spesifically this Corsola event and completly delete its existance (like it was never obtained):

 

What I have done so far is to remove the Pokemon's block and delete its Pokedex entry. (It's pretty much a new save file, no other Corsola has been obtained or even seen). But now I'm stuck in removing the obtained Mystery Gift. What can I do?

Thanks!

Edited 20 minutes ago by ATEMVEGETA