Super Smash Bros. Ultimate DLC: 9 Echo Fighters Nintendo MUST Add
8. Mega Man - Proto Man
An easy, relatively speaking, potential inclusion should Sakurai ever give it the go-ahead, Mega Man's sibling has largely the same abilities as his baby brother, the most notable difference being a preference for red. With that said, from Mega Man 9 onwards, Capcom's taken measures to distinguish the pair with slightly varying abilities, making Proto Man ripe for picking as an Echo Fighter.
The pair's arm cannons are functionally identical, though in the aforementioned game and its sequel, Proto Man takes considerably more damage as a trade-off for his superior shield, which deflects, rather than blocks, almost every type of attack and persists even when he's dashing. In the spirit of that risk/reward playstyle, Proto could fill the glass cannon archetype and serve as a technical, skill-testing alternative to Mega Man.
As for his Final Smash, Mega Man's existing 'Mega Legends' is more than suitable. All Sakurai and his team need do, is swap the two brothers' positions and hey presto: Here Comes A New Echo Fighter!