Sphenalauncher, known as Tuatalauncher (トゥアタランチャー,Tuataranchā?) in Japan, is an enemy from Mega Man ZX. It is an iguana-like Mechaniloid with tank treads and spikes on its back that it fires as missiles that can follow the player. It is normally quite docile, but if a perceived threat approaches, it will react aggressively. Sphenalaunchers appear in Area L Research Lab and are dispatched by massive spheres bearing the Slither Inc. logo that fall from the ceiling and open a door on one side.
Its name appears to be a combination of the words "sphenodontia" (English) / "tuatara" (Japanese) and "launcher".