Editing Pokedex for shiny roaming Raikou/Entei

[solid.snake.21]

I was asking if can I edit the Raikou/Entei data in the Pokedex for find them shiny in the roaming encounters, or I just need to have a lot of lucky, because I can't find a section in PkHex what help me with that
I can make soft reset with Suicune and Celebi, but with roaming pokemon... I don't know how to make a kind of soft reset to found them shiny

I found Raikou just leaving Ecruteak City by the Route 38 after release the trio  TT-TT

Edit: If I change the Pokedex data of Raikou to NOT SEE, can I get another chance to caught him shiny in the next opportunity?

Edited April 24, 2023 by solid.snake.21
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[Atrius97]

Editing the pokedex will not undo the event flags for having seen/caught a legendary. If you cannot locate the event flag/values needed to change, restore an older savefile backup from before you encountered them/before setting them roaming.

PKHeX stores old backups in the bak folder if you've edited your game before, and some emulators may have old savestate backups as well.

Edited April 25, 2023 by Atrius97