I believe it is something like this: while their body is converted into energy, their consciousness experiences an environment that is friendly to them. Perhaps it is a very restful sleep, or a pleasant dream?

[And don't even get him started on the whole Pokemon dream studies thing. That's a topic all its own!

Klinklang's gear is gonna be nice and clean from that rubbing! Thanks Tarrlok! It would rub back but it's...kinda too dangerous for that.]