I think Charon's choice is misprinted it reads:
"Search your deck for any 1 Rotom card, and switch it with any Rotom you have in play. Any damage counters and cards attached to the original Rotom remain on the new Rotom (Special Conditions and effects are removed). Then, return the original Rotom to your deck and shuffle your deck." the rotoms all have specific names fan,heat,frost etc. thus meaning you can not switch any rotom only the ones that say rotom then their level and the rest of the text.
discuss.
"Search your deck for any 1 Rotom card, and switch it with any Rotom you have in play. Any damage counters and cards attached to the original Rotom remain on the new Rotom (Special Conditions and effects are removed). Then, return the original Rotom to your deck and shuffle your deck." the rotoms all have specific names fan,heat,frost etc. thus meaning you can not switch any rotom only the ones that say rotom then their level and the rest of the text.
discuss.