Board Thread:General Mega Man Discussion/@comment-5303512-20190205154838/@comment-33173-20190205170514

Yes. It's a W present in several of his bases (specially the Wily Castles) and personal machines like the Wily Machines and Wily Capsules. Its color varies between games, mainly using the same palette from the stage and machine.

His robots usually don't have a visible mark on them, except for some manga like Mega Man Megamix and The Birth of Mega Man.