In Wario's very first appearance as the main villain of Super Mario Land 2, the big guy fully embraced copying his rival as part of his attempt to usurp him. This is immediately evident in his look: he has the mustache, the buttoned-up overalls...
You may have already known that Metroid Fusion and Zero Mission were built off of Wario Land 4's engine, and that there are even Wario Land 4 blocks in Fusion's debug room, but it looks like the connections don't stop there, because these blocks...