Like for transfer-only moves. For example, I want to transer my Sceptile to Black 2 for Dragon Pulse. Is there any way to transfer it from Alpha Sapphire to Black 2, or even Black 2 to Diamond?
There is no possible way to go back a generation. Sorry, man.
P.S. Sceptile does get Dragon Pulse from the Alpha Sapphire tutor… or you could breed a Treecko / Sceptile in Black 2, teach it Dragon Pulse and transfer it over.