You Do Need power plug adapter while traveling from Bonaire to South Sudan.

Here is Why You Need An Adapter

The outlet and plug type used in South Sudan are C and D and in Bonaire are A and C. This is how they look like.

Bonaire

In Bonaire, outlets of type A and C are in use.

Type A

Type C

South Sudan

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

Type C

Type D