Lemon and Lime Fish Pop + Organic Carrot = Baked Fish
Lemwart + Cracked Keno Egg = Lemon Omelette
If you are lucky enough to restock a "Lemon and Lime Easter Negg", a "Lemon Bumbluz Lolly" or "Lemon Sherbert Jelly Beans" here, you will receive the Chocolate! Avatar.
If your pet has Neggitus you may be able to cure them with "Lemon Lozenge. You can find them here. This is not a cure 100% of the time, and may take a few attempts. You can also visit the Healing Springshere, which is a free alternative which you can visit every half hour until your pet is cured.