The Lepidopterran Prisoner was one of the alien prisoners on Incarcecon in Ben 10: Secret of the Omnitrix.

He first appeared when Upchuck changed back into Ben and he realised that Ben had the Omnitrix. When he was attempting to steal it, Gwen defeated him by hitting him with a pipe. He was later seen chasing the crew, trying to escape with them. He managed to get onboard, however Tetrax caught him.
File:Lepidopterran Prisoner Death.png

When he got hit in the back with a laser, he was thrown into one of the security robots and was killed.

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