Johnny Sokko and his Flying Robot was an american-dubbed Japanese cartoon and was usually on Sunday mornings, I believe. Johnny Sokko a kid who would talk into his watch(?) and say the words "Johnny Sokko, Launch!!" to launch his huge prototype robot (which fired bullets out of its fingers!).
I sure hope someone else remembers this show.
Do You Remember Johnny Sokko and his Flying Robot?
Do You Remember Johnny Sokko and his Flying Robot?