What Batman Really Thinks Of Every Gotham Villain
13. Solomon Grundy
Although it seems weird to say Solomon Grundy is a pretty serious villain to face, the fact that he cannot die goes a long way.
You can beat him in whatever elaborate way you like, but the undead Hulk will be making a return appearance regardless. Doesn't matter how smart, strong, or skilled you are - Solomon Grundy can't be kept down by you, only briefly restrained.