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The Humblebums was created in 1965.
Leon Schlesinger
Merry Melodies , Invader Zim ,
Gossamer is a red haired monster who appears in the Warner Brothers Looney Tunes Merry Melodies cartoon series.
Yes , there's a 'Man-Eating Plant' voiced by Mel Blanc in the 1943 Merry Melodies cartoon "Crazy Cruise" .
(The Crazy Cruise cartoon can be found on the 5th volume of the Looney Tunes Golden Collection. )