Board Thread:General Discussion/@comment-26422668-20141108160519/@comment-3096633-20141111224832

Linkmadara wrote: Zenoseiya wrote: Ultimate Alien is largely to blame. It was a disaster for the franchise because at that point retailers considered the brand toxic and refused to stock Ben 10 toys. Now Bandai is no longer making new Ben 10 toys, including the accesories introduced by Skurd. during Ultimate Alien the Ben 10 toys were on the top selling list whit the likes of Power Rangers and Transformers.

I think it was alien force.