It depends what you mean by "dual sided."

My new Look KEO's definitely have 2 sides, but the side that has the cleat entry is weighted down at the back of the pedal so that it's in the right position for me to get in.

Some mountain bike pedals have 2 sides, and it doesn't matter which side you get in - they both work.

My boyfriend has Speedplays and they are also double sided and work on both sides.