I have clean roms of these two games and when put onto my DSi with Twilight Menu++, I can run then in DSi mode perfectly fine. However as soon as I apply any kind of patch, like a hack, such as Volt White/Volt White 2/Volt White 2 Redux, or use the pokemon randomizer, the roms no longer are able...
btw i feel this a good time to remind you guys that sea of thieves was made by rare, who also made DKC1-3 and DK64, alongside banjo kazooie and conker's bad fur day