I want to speed run this game since I never have done a speed run before. I figure it would take a couple weeks but not sure. If someone could let me know, thanks!

And also whats the fastest region to play it on?

It is a pretty short game to learn to be honest, plus it is kind of one of the easier Mario RPGs to learn. However, the endgame is pretty brutal to learn, so I would recommend taking time with learning how to dodge the attacks of the bosses on the final stretch of the game, especially Kamek Duo and Shiny RoboBowser. Also, all regions are equally fast to our knowledge at the moment.

Thanks! Also, if I didn't live stream it but record it would that suffice as a run to submit?

That would be absolutely fine! A video would be preferred, but no proof of any sort is currently required.

Thanks!