Every time I come to IMDb, I want to crawl back into five-year-old-dom. I used to rush home from first grade to catch Gigantor at 3, followed by Kimba the White Lion at 3:30, hoping that the bus driver wouldn't be out of root beer lollipops that day. Now they show selected reruns of the original series (no, not the later, full-color "Tetsujin 28-Go" ["Iron Man No. 28"]: I can give you the kanji, too, but not with _this_ keyboard) on the Cartoon Network at 5:30AM, before reasonable people have awakened. I seem to remember that my favorite episode involved Gigantor fighting against an evil robot that could shoot lava bursts out of a slot above his forehead. Naturally, the robot was gigantic and could fly, etc. (They're everyday phenomena, no?) I always thought something was fishy about Jimmy Sparks's voice--only later to learn that it was a female--but, then again, Debi Derryberry does a fine, thoroughly convincing job as both Jimmy Neutron and Zatch Bell, so I can scarcely complain.
