Where do you find the rainbow watering can on tamagotchi color?

In Tamagotchi Color, the rainbow watering can can be found in the shop once your Tamagotchi has evolved into an adult. You need to have enough Gotchi points to purchase it. After acquiring it, you can use it to water your garden and grow various types of flowers. Keep an eye out for special events or features that may also unlock or provide access to the watering can.