I was wondering if I am allowed to use a Datel Freeloader to launch a JP version of Mansion. It is built into my Action Replay and was wondering if there was any rule that would void my run due to the use of such loaders.

Freeloaders should be fine, it is preferable that people run on a Wii from the disc channel, however if you're not able to do that then what you described is fine. ATM we don't have a lot of info about how freeloaders compare to normal loading, but they aren't specifically banned. We should look into it more as a community

Thanks Skoz. Much appreciated!