Dumbella has appeared in 58 comics from Harvey since 1962. The most recent cataloged appearance dates to 1994. Most cataloged appearances come from Wendy, the Good Little Witch.
Harvey
14 issues
One-Shot
8 issues
15 issues
28 issues
5 issues
97 issues
12 issues
18 issues
4 issues
Casper Digest Magazine (1991)
Pink Panther Super Special (1993)
Casper Enchanted Tales Digest (1992)
Wendy The Good Little Witch (1991)
Casper the Friendly Ghost (1991)
Wendy Digest Magazine (1990)
Wendy, the Good Little Witch (1960)
Casper and ... (1987)
Casper Digest (1986)
Pearl
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