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

Here is Why You Need An Adapter

The outlet and plug type used in Guinea are C, F and K 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

Guinea

In Guinea, outlets of type C, F and K are in use.

Type C

Type F

Type K