Publisher's Synopsis
"But You Only Need One" is a Ben 10 parody featuring Ben Tennyson and Rook Blonko.
One of Ben 10's big selling points is the fact that he can transform into a large variety of powerful alien transformations, each with their own unique set of abilities.
With that being said, Ben Tennyson often relies on only a handful of his favorite alien transformations to solve his problems.
This reliance on only a handful of his aliens heavily limits what Ben is capable of, and to make matters worse his favorite aliens are more flashy and strong than they are useful.
To add insult to injury, it is arguable that Ben only really needs one of his many alien transformations to solve most of his problems.
If that wasn't bad enough, this extremely useful transformation is one that Ben has had since he was ten years old and is one that Ben very rarely uses.
This parody highlights the absurdity of Ben 10's biggest gimmick and the core of his brand identity, the fact that he can transform into 10+ aliens, being utterly pointless considering the fact that he only really needs one alien transformation to solve most of his problems.