for the play coin setter, you need to launch a full blown homebrew app, which is not something that's possible on 9.4. So no.
if you are on 9.2 or lower there is a homebrew alternative iirc that can set play coins, that would work through ninjhax just for the record, the sky3ds has no exploit userland or otherwise, its just pure cart emulation
I think it might be possible with the spider3dstools I wish someone with more experience would try it :/
Although the spider3ds has been used for things like this i haven't yet seen it running any home-brew specially in versions like 9.3 or 9.4, could happen though
