You Do Need power plug adapter while traveling from Pakistan to Tahiti.

Here is Why You Need An Adapter

The outlet and plug type used in Tahiti are C and E and in Pakistan are C and D. This is how they look like.

Pakistan

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

Type C

Type D

Tahiti

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

Type C

Type E