Well, once they're at Gen 5, you use the Poke Transporter and then to the Pokémon Bank, with it you can go to Gen 6 & 7, easy after that..Actually goes Gen 1 to Gen 7, but still a hassle haha. But the hassle is rewarded with Pokemon having Hidden Abilities, so kinda worth it. The glitches do work, on top of at least one new one discovered for Mew. But it's a very long glitch, video that covers it is 12 minutes with cuts.
I meant, if the glitch does work with the virtual console releases of Red/Blue/Yellow, then use those instead, as you can transfer them directly to the Poke Transporter then to Bank. Without going through each Gen from 1..