That's strange. You must be right about that because I could've sworn the dragon did have blood running down its chest. I didn't realize it actually doesn't until I looked at the label art just now. I wonder where we saw that? It's not on the box, label, or manual. Nintendo Power, maybe?

After looking at what the hero in the Japanese version of Power Blade looks like, and the general similarity of the games, it's like Taito decided that Mega Man looks better without armor and made their own game like that.