Look what you are using. A dumpster of knowlage that no one should take for serious. Anyone can write anything in that sorry exuse for encyclopedia, even that Lincoln hid alien antenas under his top hat. I rest my case.
I think you need to provide some evidence to the contrary to have a case. I doubt either of us make for reliable sources.
Napoleon was certainly not untouchable during the time frame, there are other sources that'll back he was declared an outlaw. I tried "Hundred Days Napoleon outlaw" just to have all the words there, pick one you like? And while there are people willing to CLAIM the term refers to Napoleon, I doubt you could find one contemporary to FDR's term to make the connection.
But seriously, they refer to two opposite ends of a term. For every guy trying to drag Napoleon into the argument, it feels a bit weak when they compare how he went out to how a president goes in. Just because they both have "hundred days" in the term doesn't mean one stemmed from the other. Colloquial usage most certainly refers to the actions taken in the first hundred days, it has nothing to do with Napoleon's fall.