mkoschi, Trickster was a villain, wasn't he? Anyway, although others are more capable of pointing you in the right direction on GAC., I'm sure you'll be bored to hear that in the U.K. we had Gadget Man and Gimmick Kid, a short lived strip in Lion, a weekly comic published by IPC, in the late 60's and 1970. These were full fledged costumed heroes whose headquarters were in a hollow iceberg. They used lots of invented gadgets and tricks to fight crime.
Also, DC comics had Merry, Girl of a Thousand Gimmicks (have I got that right?) I'm too lazy to rake about for a copy of Strange Adventures? (have I got that right?) where she was reprinted.
Gosh, I feel a bit thick - consulting Rovin, I see that Merry debuted in Star Spangled Comics #81, 1948 and has a really daft origin, but she eventually replaced Stripesy as the Star Spangled Kid's sidekick.