Today has been a very good day for me, mostly on the merit of the fact that I finally managed to move all of my Pokémon off of my DS and onto my Switch. This is very important to me because I have a lot of fond memories of playing Pokémon when I was younger. I poured hours and hours into it, and being able to transfer that to the newer games is simply wonderful.
In case, by chance, anyone else reading this has a 3DS with custom firmware and is receiving error code 006-1608 when trying to use Pokémon Bank, here's how I solved the problem:
Open FBI and check the tickets for your system's titles. Look for these tickets: - 0004000E000C9B00
- 00040000000C9B00
- 0004000D000C9B00
Source
Me and my babies having a picnic together: