To advance to level nine, tap on “Goals” and complete the list of required goals. The game will bump you to level nine after you’ve completed required goals, such as buying breeding structures and feeding your existing monsters.

To avoid having to wait for the breeding period to end, accept the offer to pay 12 diamonds immediately after tapping on “Breed. ” You will then have the option to sell the Bowgart, or place it on an island. [2] X Research source

If your breeding attempt was unsuccessful, return to the breeding structure, tap on “Retry,” and select either the same monsters you used previously, or try a different monster pairing. In some cases, you may need to try breeding the Bowgart one or more times using different monster combinations as outlined in step #3.