Got a new pet, but don’t want to put your old one out to pasture just yet? Pet Fusion will solve just that problem.
Open the pet interface, select the Pet Fusion column, and fuse your pets while they’re taking a rest.
Pet appearance and type will follow after that of the first pet you selected for fusion. However, your fused pet will automatically retain the highest level, Potential, Growth, Aptitude and Rank of both pets.