You Do Need power plug adapter while traveling from Mexico to Yemen.

Here is Why You Need An Adapter

The outlet and plug type used in Yemen are A, D and G and in Mexico are A and B. This is how they look like.

Mexico

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

Type A

Type B

Yemen

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

Type A

Type D

Type G