You Do Need power plug adapter while traveling from Saint Vincent and the Grenadines to Mauritius.

Here is Why You Need An Adapter

The outlet and plug type used in Mauritius are C and G and in Saint Vincent and the Grenadines are A, B and G. This is how they look like.

Saint Vincent and the Grenadines

In Saint Vincent and the Grenadines, outlets of type A, B and G are in use.

Type A

Type B

Type G

Mauritius

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

Type C

Type G