If this was a "Save My Heroes" contest, I'd be arguing for Wario's inclusion and using the same arguments. I don't think anyone would argue Waluigi as a hero. I'm not arguing for or against Waluigi's inclusion in this, but Wario shouldn't have anything to do with that decision.
EDIT: Which sounds crazy, I know, and I withdraw whatever argument I was going for.
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In this world which will someday fall to ruin...
...dreams and hopes don't matter at all.