Shellhead

Shellhead is one of Ben's 10,000 future Omnitrix aliens. Kenny described Shellhead as a giant turtle who's only power was to hide in his shell, so he might look something like Terraspin. It is unknown if he will show in'' Ben 10 Ultimate Alien. but because he is a turtle and he can hide in his shell, he might be terraspin. and ken just forgot how powerful terrispin is.''