Board Thread:General Discussion/@comment-34988029-20181028030459/@comment-28802873-20181028111733

They've had Ben's powers since the watch shocked them. Ben couldn't have had theirs unless the Ultimatrix absorbed them when it mutated them. Plus, Gwen's powers are part of her being, not her DNA, and Kevin's powers are mutant in nature, Ben can't really get them unless he was them.