You Do Need power plug adapter while traveling from Cocos (Keeling) Islands to Paraguay.

Here is Why You Need An Adapter

The outlet and plug type used in Paraguay is C and in Cocos (Keeling) Islands is I. This is how they look like.

In Cocos (Keeling) Islands, outlets of type I are in use.

Type I

In Paraguay, outlets of type C are in use.

Type C

I am from

going to