Don’t Really know about reputation of Manipal University outside India, but I can share some facts.
MIT 10th block is the largest hostel in Asia.
The Anatomy and Pathology Museum in KMC is largest Anatomy museum in the continent. 25% of the doctors in Malaysia is a graduates of Manipal University.
All of the above facts can be verified from Google.
Apart from that, CEO of Microsoft, CEO of Nokia, South East Asia Regional Head of General Electric, World Renowned Chef Vikas Khanna, and list goes on are the alumni of this university