PyneappleMann TV

I'm not sure how alive this forum still is, but I'm at my wits end.. I locked everywhere for a solution and cant find one. So my problem is one that I've seen multiple times on different forums. It's the bug where the veteran does not appear in the Giant Chasm. I beat the Champion and did most thing I couldve done after beating it. Now I tried to use the cheat codes I found online in the forums to fix this. One code where u have to press R when you walk in doesn't do anything. The other code where u press select before walking in kinda breaks my game, where the pokemon and pokedex options dissapear from the menu and in the room behind it I see a Kyurem-White, a normal kyurem, reshiram, N and Bianca and Cheren. I can fight Kyurem infinitely every time I walk out of the room now. When talking to kyurem-white, I get Ghetsis dialogue... So as u can read, I'm hella confused now.. (Also about the fact that deoxys shows up outside the cave, even before talking to the veteran, and he keeps respawning infinitely) Please someone give me a solution to this ♡ (I am playing Volt White 2 Redux Complete (1.4.1))