You Do Need power plug adapter while traveling from Pakistan to Mauritius.

Here is Why You Need An Adapter

The outlet and plug type used in Mauritius are C and G and in Pakistan are C and D. This is how they look like.

Pakistan

In Pakistan, outlets of type C and D are in use.

Type C

Type D

Mauritius

In Mauritius, outlets of type C and G are in use.

Type C

Type G