IS JEE (main) is necessary in Graphics design courses?

You don't need to appear in JEE Main if you're applying to B.Des Course.
UCEED or Undergraduate Common Entrance Examination is the entrance test that needs to qualified for undergraduation in Design at Indian Institute of Technology, Bombay, IIT Guwahati, IIITDM Jabalpur. The basic eligibility criteria is to pass 12th from any recognized board with any stream.