Lol. Exactly buddy, a bit of fun never hurt anyone. Ah man, perfect analogy and casting - the wheel chair prop flipping over from the hero to the villain. I wanted to drop “McNeto” in there somewhere but it doesn’t work in sensibly - if any of this makes sense in the first place, lol. Unbreakable! - one of my favourite Willis movies along with The Sixth Sense.
It's not the style that is tailor made for him. the one fight he lost in his prime was against basically the opposite type of opponent so i think it's far from his kryptonite.
If I look at the question through the perspective of Louis' 3 defeats (Schmeling, Charles, Marciano) in his career; movement (which was not Louis's forte) did not have a decisively negative effect on Joe Louis' career.
I mean, generally speaking movement troubles everyone. There's a reason so much emphasis in gyms is placed on roadwork and ring maneuvering drills, especially by old school coaches. Precious few fighters have reached elite tier with their feet in cement (in the modern era I can think of James Toney and...that's really it). Now, if you mean "was movement the skeleton key to shutting down all that Louis did effectively?", ie would he be flummoxed by a Jimmy Ellis or something? I don't think so, no. In fact most historians and experts usually point to Joe's own economy of movement, even in spite of his slowness of gait, as perhaps his greatest asset behind only the placement and technique of his punches.
It sure did trouble Joe Louis in Dec 1941 against Billy Conn until the fateful round 13, when Louis closed the deal with a right hand.