How do u change the zekrom/reshiram theme in the login screen back to the loading screen b4 it?

[Plbbrt]

How do u change the zekrom/reshiram theme in the login screen back to the loading screen b4 it? (the one in the picture attached) 

 

I mean I want it to always be this sliding picture.. I remember before unova released, it was like that.. 

Edited February 3, 2022 by Plbbrt

[Plbbrt]

(I want the login as a sliding screen cos i have this other theme which only works as a sliding screen)

[dMicah]

bump

[Plbbrt]

bump?