20 years later, Pokemon Red and Blue pals can finally be freed from their Gen 1 prisons with this homebrew

gamesradar.com:

If you're like me, you have an old GBA somewhere in your parents' attic which you've presumed to be the final resting place for so many Pokemon Red and Blue pals you caught during your childhood. Not so fast! Thanks to a new homebrew, you can rescue your old Pokemon from their Gen 1 prisons and add them to your current collection, including Pokemon Home and Pokemon Bank.

For the uninitiated, the Pokemon games are impressively streamlined when it comes to trading between generations. Right now, you can dig out your old copy of Pokemon Ruby or Sapphire and transfer pocket monsters you caught back in 2002 to your Sword or Shield save. Granted, it's not as simple as busting out your GBA and connecting to your Switch via Bluetooth - we have a dedicated guide on Pokemon Home transfers if you're interested - but it is possible. 

Pokemon from Gen 1 and 2, however, have been lost to time unless you've been brave enough to try one of the variably sketchy DIY solutions currently available, which are usually complicated and legally ambiguous. Now there's a much easier solution, thanks to Redditor Lorenzooone, who came up with a homebrew that lets you easily trade between Gen 1 and 2 and Gen 3 with nothing but a link cable. "This can be useful to bring your Pokémon 'trapped' in the Gen 1/2 games to Pokémon Bank and Pokémon Home," said the creator. 

Of course, it's still a process, since there's still no Nintendo-supported way to link up your Switch with your old GBA, but Lorenzooone's tutorial (opens in new tab) makes it look surprisingly manageable. One thing worth mentioning is that there's a chance your old Gen 1 saves are permanently lost if your Red or Blue copy's original battery died, since those old cartridges held their save