What 'IF' Shanks has the Repel Repel Fruit? (like Pain in Naruto.) Like he can repel any kind of attacks even BB Darkness and Earthquake DFs, and don't forget that he is the master of Haki... I'm pretty sure it'll be the undisputed DF.
There's a theory that he can manipulate time~
What you are describing is literally the paw paw fruit.
No way. Shanks is only a master of haki, he and his crew most probably don't have DFs
He is probably not a df user as he saved luffy at sea and did not seem weak after doing so.
Shank's sword has a devil fruit
Maybe his sword does but I don't think shanks himself has a devil fruit
What do you think?