You Do Need power plug adapter while traveling from Burkina Faso to Guatemala.

Here is Why You Need An Adapter

The outlet and plug type used in Guatemala are A and B and in Burkina Faso are C and E. This is how they look like.

Burkina Faso

In Burkina Faso, outlets of type C and E are in use.

Type C

Type E

Guatemala

In Guatemala, outlets of type A and B are in use.

Type A

Type B