Thread:76.20.157.180/@comment-1038387-20130206142058/@comment-1038387-20130206142247

Also, Superboy/Kon-El did not appear in Super Friends. That was young Clark Kent.

If you count that, it's actually his third: he also appeared in the Filmation series The Adventures of Superboy (voiced by Bob Hastings, the later Jim Gordon). But we don't count that.