So I watched this intro to the 1979 Plastic Man cartoon (thanks for pointing it out, snell).
And one of the first things to jump out at me was Plastic Man turning into a rickshaw.
Okay, I kind of adore rickshaws? But Plastic Man has often turned into cars, so that's definitely kind of meh.
Here's what really got my attention, though: The Clam.
Yes, this is a vaguely pirate-themed clam who is also apparently a supervillain.
And apparently, a lot of the villains from this cartoon were like this (names pulled from the wikiped page): Dr. Superstein, Doctor Dinosaur (hey!), Computerhead, Badladdin (apparently an evil genie?!), Count Graffiti, Joggernaught, and Gearshift Swift (who sells Earth to aliens for a quick buck).
Bring these guys back. Especially The Clam.