He relies on electrokinesis while Snide wields his katana.
He did not have a human form, nor was he even two people.
He and Snide share the same body and communicate with each other through their items. For example, Heckyl talks to Snide through his pocket watch while Snide talks to Heckyl through the hilt of his katana.
He never turned to the side of good.
He turned to the side of the good after being separated from Snide by Lord Arcanon, whom he has sought revenge on for destroying his home planet of Sentai 6.
He never teamed up with the Kyoryugers to defeat the Deboth Army.
He went back in time with the Dino Charge Rangers to ultimately defeat Sledge.