Suggested by Anonymous Dragon Man is a pretty powerful robot. He may be rather large but he can move at high speeds and has some pretty intense abilities. His fire breath will be negated here since that doesn’t really hurt Hellboy. It then comes down to physical power and speed. Dragon Man seems to surpass Hellboy in both of these areas. Hellboy’s sword will deal a lot of damage if he can get close but I don’t believe he will be able to get in range to do this. Dragon Man’s speed will prevent this in combat and he is durable enough to take a few stray hits while they come to blows. Dragon Man wins.