The only "evidence" about Spanx The Almighty is in his Holy Book; his followers point to the creation as evidence. Some claim they get direct messages from Spanx, they claim to be his prophets.
So, you completely misunderstand. Not "what evidence exists" but, given that there is none, what can you tell me about Spanx so that it would be possible to get any?
For instance, if people are getting messages, they have to be delivered somehow, so we should be able to detect that, MRI, changes in the brain, the energy used to deliver it, etc.
If Spanx is all powerful, we should be able to detect uses of that power in terms of energy discharge, etc.
If, on the other hand, you are telling me that Spanx is completely undetectable, then first that raises the question of "how did the holy books get transcribed since, by definition they couldn't know anything about him" and secondly, if there is something that is, by definition, unknowable, then how could there be knowledge we are lacking?