Here's a look back at how the original Parasite came to be!
Power Of The Parasite
The Power Of The Parasite
The Parasite's Power Play
After escaping his alien prison and returning to Earth, the Parasite was such a menace that he faced both Superman and Luthor (stealing a little of Luthor's intelligence along the way), and forcing Superman and Luthor to work together to stop the leeching menace (with Luthor showing off his recently acquired super-suit as well....).
The Double-Or-Nothing Life Of SupermanTerra-Man, Amalak, the Kryptonite Man (formerly the Kryptonite Kid), Brainiac, Mr. Mxyzptlk and Luthor...
...but, oddly, it was the Parasite (unknowingly, or more accurately, Superman using power absorption) who helped saved the day!
The Parasite's Prism Of Peril
This time around, the Parasite was using a prism to absorb Superman's powers, and transfer them to others (like the son of Clark Kent's best friend, Jon Ross), and getting those individuals to battle Superman.
Things still turned out in favor of the son of Krypton, though, eventually!
Break With Batman
Behind the Scenes
Laser War Over Metropolis
This time around, the Parasite's plan was revealed, and how he was taking bits of Superman's power over time, and targeting some specific abilities of Superman's as well (such as his control over his scenes), all to make Superman easier to beat.
This leads into an all-out war with an evenly matched Superman and Parasite....for a time. Problem is, Superman did figure out how to beat the Parasite, and did!
Sitting In PrisonMetallo broke out of the prison of Superman's Island (which holds the deadliest of Superman's foes, but Parasite was still in his cell inside!).
Superman's Last Christmas
Superman #369 (March, 1982 by Cary Bates, Rich Buckler and Frank McLaughlin, and a cover by Buckler and Frank Giacoia) answers that question, with the Parasite returning for the holidays, looking for powers from the Man of Steel for his stocking, and using Clark Kent's old friend, Cory Renwald to get them.
Yule enjoy this one!
The Parasite's Power Ploys
The young legacy hero uses his radio wave powers to help Superman against the Parasite in the present, while Superman thinks back to his time as Superboy, when he worked with Air Wave's father (who was also a costumed hero known as Air Wave).
More of Clark Kent's earlier days are brought to light thanks to the Parasite!
This also marked the first time Parasite faced Supergirl...well, almost.
It was Superman who faced the Parasite, breaking free in time to rendezvous with his cousin for her special day (which actually happened in Supergirl #20 of June, 1984, where the Kryptonian cousins faced a Parasite clone together!).
The Most Popular Man In Metropolis
....where Superman is facing a drain on his overall approval ratings in Metropolis as a new darling of the public, Joe Blohe, seems to absorb it from him (is this a subtle enough reference for you to figure out the plan of the Parasite in this story by Craig Boldman and Kurt Schaffenberger, under an Eduardo Barreto cover?).
Then the whole DC Universe changed with the Crisis On Infinite Earths, and there wasn't a Parasite anymore....
Return Of The Parasite
Thanks to a little manipulation from Darkseid, Rudy turned into the Parasite (though shaded green this time) to face Firestorm in Firestorm #58 (April, 1987) by John Ostrander, Joe Brozowski and Pablo Marcos, and that Parasite faced Firestorm, joined the Suicide Squad, and eventually got around to facing Superman...
While a sucker may be born every minute, the Parasite is more like a cockroach, surviving and returning time after time....but that leach is beaten by truth, justice and the American way!