The German publisher is putting out a complete box of Yu-Gi-Oh! GX. It appears that the first 3 seasons will be the 4kids version in German dub only, but they’re adding season 4 in Japanese with subtitles. That’s actually how I watched it first, back in 2008 or 2009 - first 3 seasons dubbed (back then streaming on the German TV channels website), then the 4th in Japanese (on YouTube I think).
I had watched some episodes dubbed before and a few in Japanese when I was in the country, but that was my first complete watch of it.

So yeah, I think I need this Box, also since we never know if the sub will be on Crunchyroll forever.