You Do Need power plug adapter while traveling from Zimbabwe to Seychelles.

Here is Why You Need An Adapter

The outlet and plug type used in Seychelles is G and in Zimbabwe are D and G. This is how they look like.

Zimbabwe

In Zimbabwe, outlets of type D and G are in use.

Type D

Type G

Seychelles

In Seychelles, outlets of type G are in use.

Type G