Male dumbo rat paralyzed overnight?

I am SO extremely sorry to hear about this. I feel so bad for your rat and you.xx Take him to the vets ASAP and when you get their, tell the people it's an emergency to see if they'll take you immediately. Maybe you should have them put him down with a lethal injection? Something painless for him. Letting him continue to live like that would be so painful I'm sure for him. Calling the pet store or taking him/her to the pet store would be a waste of time. I hope all goes well. xoxo