I know princeton does not grant transfer admission but with the exception of that has there been any case where a student got accepted to every single other ivy league as a transfer student?
I doubt it. By the time a student transfers s/he has a specific major in mind and selects the new school that suits that major rather than seeking the prestige of “any Ivy”. The schools vary in environment and culture and a wise student goes for “fit” as well, so would not apy to all of them.
^That.