>>58561659I guess I can try to explain how I think it works but I could mess something up typing this off the top of my head. he was saying he'd make a video at some point though so.
Basically rest at the nearest center first and set time to morning
keep fast traveling to 8 until you get alpha drilbur spawn. He focused on only taking ones from around the outer edge so do that if you want to be safe but middle ones could probably work too
Anyway aggro it and lead back to the gate you enter from. Wait for dig then exit so it comes outside with you and immediately save and reload the game.
Now that it's out keep it spawned in but move away enough to despawn the Pokemon in the zone so go about 70m away. Once you have that save and reset and keep reloading until you get another alpha Drilbur.
He in total got 3 out but more should be better. Just repeat the process until you have 3 or as many as you can manage out of the zone while keeping in mind you only have until the night transition.
Once you have your Drilbur out lead them about 60 meters away from the gate and save the game with them there. Then reload and move about 60 meters further away from them and save and reload.
From there move back towards the zone with the Drilbur so both them and the new spawns are loaded and save and reload
finally let them knock you out with everything loaded and when you walk back from the poke center the spawn overload should be active
Once you can confirm it's working (he was getting at least 2 gible each time it seemed) reset again and after being knocked out save just before you get close enough to load the pokemon from the zone in from there just check spawns and keep resetting the game until you get your Gible. Just make sure you don't fast travel back to or near the zone as it will likely ruin the glitch and the spawns will go back to normal
Again I could have messed up a part here but off the top of my head I think that's what it was.