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

Here is Why You Need An Adapter

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

North Korea

In North Korea, outlets of type C are in use.

Type C

Mauritius

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

Type C

Type G