I stole this list off of the link in pivovarova's link from her post (which is a super link, check it out) . I edited it and italicized the monsters that i think are the best to farm for that specific item.
I. Eversun Elder
· 20 Ancient Copper Coins - Zombie (Town Hall Basement, Mortuary), Demonic Zombie (Mortuary [Eversun North]), Greedy Rat (Inn Basement, Farrell Family Crypt), Corpse-Cruncher (Swan Lake Basin)
· 20 Aprons - Female Vampire Bat (Canute Canal [Eversun South]), Hulu Bamboo (Placid Plain, Giantwood Forest), Minotaur (Blakatoa Peak)
· 20 Bearwood Carvings - Wild Flying Pupu (Eversun North/South), Toxic Trunk (Inn Basement)
· 20 Burial Bands - Pupu President Corpse (Inn Basement), Little Eye (Farrell Family Crypt)
· 20 Dried Lizards - Big Lidded Lizard, Lil' Lidded Lizard, Lizard Leader (Copperhorn Mountain), Red Scorpion (Blakatoa Peak)
· 20 Guanos - Batling (Eversun Well), Corpse-Cruncher (Swan Lake Basin)
· 20 Lotus Seeds - Pupu, Hedgehog (Eversun North/South)
· 20 Pacifiers - Dairy Pu Mama, Dairy Pu Dada (Swan Lake Basin), Pearly Tadpoles (Eversun Well)
· 20 Pearly Frogspawns - Pearly Frog (Canute Canal [Eversun South])
· 20 Pupu Feathers - Wild Pupu (Eversun North/South), 'Lil Dairy Pu, Dairy Pu Dada (Swan Lake Basin)
· 20 Soybeans - Flying Pupu (Eversun North/South), Forest Kuku Papa (Eversun North, Eversun South), Greedy Rats (Inn Basement, Farrell Family Crypt)
· 20 Spider's Threads - Spider, Itsy Bitsy, Sombre Zombie (Farrell Family Crypt)
· 20 Sugarcanes - Pupu, Forest Kuku Egg (Eversun North/South)
· 20 Tangerines - Forest Kuku Egg (Eversun North, Eversun South)
· 20 Wobbly Jellies - Glob, Golden Glob (Eversun Well), Grape Glob (Town Hall Basement) recommend 1st room with yellow globs in well
Darkdale Elder
· 20 Aprons - Female Vampire Bat (Canute Canal [Eversun South]), Hulu Bamboo (Placid Plain, Giantwood Forest), Minotaur (Blakatoa Peak)
· 20 Chicken Stocks - Bow-Wow Bum, Bonkers Bow-Wow Bum (Placid Plain), Chestbeater (Canute Canal [Eversun South]), Male Bird of Paradise (Phoenix Tower)
· 20 Embroidered Handkerchiefs - Giant Hedgehog (Copperhorn Mountain, Palcid Plain)
· 20 Foxy Fox's Perfumes - Fox Cub (Giantwood Forest), Redd Foxx (Grassgreen Square), Female Bird of Paradise (Phoenix Tower)
· 20 Gold Coins - Mystery Mouse (World of Pandora's Box, Blakatoa), Little Ghost (Longstone Woods), Delicate Box (World of Pandora's Box, Malachite Cavern), Metal Destroyer (East Sea Plain), Raging Rat (Canute Canal [Blakatoa]), Heinous Ghost Head (Town-God Temple), Minotaur (Blakatoa Peak)
· 20 Gunpowders - Crimson Glob (Neptune's Temple)
· 20 Magic Feathers - Divine Male Kuku (Grassgreen Square), King-size Kuku King (Phoenix Tower)
· 20 Pearly Frogspawns - Pearly Frog (Canute Canal [Eversun South])
· 20 Pottery Jars - Man-Eating Zombie, Ice Zombie (Neptune's Temple), Stubborn Stone (Grassgreen Square), Hardcore Stone (Canute Canal [Blakatoa]), Toasted Wisewood (East Sea Plain)
· 20 Spatulas - Bandit Chef (Grizzly Garrison), Heinous Ghost Head (Town-God Temple)
· 20 Toy Bones - Bandit Bow-Wow (Blakatoa, Pandora's Grotto), Red Scorpion (Blakatoa Peak)
· 20 Vine Whips - Pink Pitcher Plant (Swan Lake Basin), Orange Whipping Grass (Swan Lake Basin, Copperhorn Mountain, Blakatoa), Giant Rat (Town Hall Basement), Man-Eating Marigold (Placid Plain), Caskmaster (Inn Basement)
· 20 Weightgain 2000s - Premier Pupu (Placid Plain), King-Size Kuku Papa, Male Bird of Paradise (Phoenix Tower)
· 20 Wines - King Glob (Neptune's Temple), Bandit Thug (Grizzly Garrison), Blazing Flame Scorpion (Blakatoa Peak)