If you asking about Manipal Institute of Technology, You should be passed in 3 year Diploma granted by the Board of Technical Examination of a State Government, with minimum 45 % aggregate marks or equivalent. The admission is through MET Entrance test. You can check the information with the given below link.

https://manipal.edu/mu/admission/indian-students/lateral-entry.html

If you are asking for Madras Institute of Technology, It does not offer Lateral Entry programme.

Good Luck!