I watched the episode Dr Animo and the Mutant Ray a while back, and recently I watched some Omniverse episodes with the Biomitrix. So I was thinking about possible fusions. It should have a name, strengths and weaknesses.
Echo Saur (Echo Echo and Humungousaur)
Strengths: has super strength. Can use shoot sonic waves.
Weaknesses: Can no longer copy. Has less strength than Humungousaur but more than Echo Echo