Can some please tell me if KADEEM HARDISON had ever guest stared in Fresh prince of bel-air if so what epsiode?

I believe Kadeem Hardison guest starred in the Halloween Episode from the first season--the one where Will and Carlton compete to find a date for their Costume Party. Will tries to impress the girl by lying about his celebrity connections, Kadeem Hardison being one of them.

Correct.

yeah