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

Here is Why You Need An Adapter

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

South Korea

In South Korea, outlets of type F are in use.

Type F

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