Hello aspirant,
Yes, ofcourse you can do mba from iim after doing mtech.
The main requirement for a person to do mba be it from iim ir any other institute or from even abroad, is to have completed graduation.
Graduates can only apply for mba, unless they are in integrated programme.
You can do mba after btech, bsc, phd.
All the best.

Hello Karan,
You can obviously do MBA after M.tech. But there is no relation of doing mba after m.tech. if possible, skip it.
Look for something different from MBA.
Last decision is yours.
Good luck