Continuity mistake: When they are debating parole for Casanova, Casanova is giving his plea. During this, he is sitting down while his hands are up near his chest. The camera changes angles to the entire room, and you can see his hands are in his lap, not up near his chest as seen in the scene before.
Continuity mistake: After the Mystery Men accidentally kill Captain Amazing, they make a quick exit, and The Blue Raja drops a fork while leaving. When we see Casanova hold up that fork to the machine we notice that the fork catches the light very well, as if it were new. Which means it wasn't the same fork, as the one that Blue Raja dropped wasn't that well polished to begin with.
Revealing mistake: As the Spleen and Invisible Boy stand silhouetted in front of the moon, their motions are easy to tell as the film being run forward and backwards.
Continuity mistake: The Shoveler uses his hard hat as a fulcrum to shoot Roy up onto the roof of the car. When he kicks the shovel up a second later, he suddenly has the hat on.
Continuity mistake: When the Bowler first introduces her ball, the material is mostly clear. When it's sitting on the table, the material is a slightly opaque pink.
Chosen answer: Gauntlets that look cool and would help him block blows in hand-to-hand. (If he wasn't so bad at it, anyway.)
Grumpy Scot