From Creatures Wikia
The Tomecko is a plant and an animal. For the first part of its life it runs around looking like a gecko, then slowly metamorphises into a plant. This plant has three red fruit on it that will grow into new Tomeckos if your norns don't eat them first. When the fruit of the Tomeko rot, they leave behind a small seed that looks exactly like the eye of a Tomeko critter. If not eaten, this seed will grow into a new Tomeko lizard which will run around your NornGarden.