Great resource! But a lot of it is very old. I recently discovered this open source ds cart[1] and an alternative SDK[2] to devkitPro. Both were used in the development of a demo[3] released at Revision this year.

[1]: https://www.lnh-team.org/

[2]: https://blocksds.skylyrac.net/

[3]: https://www.pouet.net/prod.php?which=105928

Even the version linked to is out of date. The homepage links to a version of this guide[0] updated as recently as 2024. Still likely not the best place to get started.

0: https://www.patater.com/manual-git/

Yea, the link really should be switched to this. Has a much more modern feel, hell as I was reading the OP the reason why I opened the comments was to see if someone commented on how dated the UI was.