A good guy paired with a bad guy? Huh?

Metamorpho- Sandman

At first glance, this pairing appears to be based on what the characters do and not who they are. But Metamorpho and Sandman not only have similar abilities, but are rough around the edges dudes who have played both “good guy” and “bad guy” side of the street.

Commonalities:
Both are shapeshifters, due to their bodies being composed of sand/various elements found in the human body, are superhumanly strong, have dissipated and been reassembled into separate, seemingly unique personas several times and, like I said above, are rough and tumble fellas.

Differences:
Chiefly, the Sandman was conceived as a thug, but was reformed in the 1980s and ‘90s. Metamorpho has been shown to be easily hypnotized and thus has often been a pawn of various super-villains.

Alternate histories:

ME: Low level hood Rex Mason is exposed to radiation and is thus transformed into a being that can shapeshift into the various elements found in the human body. Using the codename Metamorpho, he opposes the Blue Beetle and other superhuman operatives. But after tiring of criminal activity, he is befriended by Robotman and eventually reforms, joining the Justice League. Metamorpho’s body has dissipated and reassembled in both benign and villainous orientations.

SM: Adventurer William Baker is exposed to the energies of a mystical artifact and is thus transformed into a being composed of sand like particles. Taking the codename Sandman, he works largely alone and declines an offer to join the Avengers. He eventually joins Captain America’s Defenders and the Avengers, but is easily controlled by super villains. Sandman’s body was thought to be destroyed, although he has recently reassembled himself and has since worked with the Defenders again.