Roader

The Mono-Roader from Mega Man 4 is able to shield its eyes and attack by spinning. The Mega Man 5 Mono-Roader only attacks by driving in a straight pathway.

Mono-Roader (X series)
Unlike the classic predecessors, the X series Mono-Roader has some spikes (almost like daggers or mini-javelins) in attempts to pierce X.

=Twin Roader=

The Twin Roader is a lot like the Mono-Roader from Mega Man 5, only it has two wheels and the ability to turn around.