>>33244154Let's all stay informed.
Using a nanab DOES have a residual effect where around 30% of the berry's effect remains forever until flee. It does work like that. However this is useless anyways since you can just wait until the pokemon attacks for your throw.
Alternating nanab/razz does NOTHING. It's a dumb myth. It's worse than "hold A+B!" because it actually hurts your chances.