Board Thread:Questions and Answers/@comment-67.233.246.204-20130621194928/@comment-4848837-20130705180108

XLR8fansixteen wrote: But human DNA in the Omnitrix while Ben is using it can't happen, because the Omnitrix will not turn its user into their own species. This.

All of the circumstances from the original post are possible, if anyone but Ben were to use the Omnitrix. Before Ben got the Omnitrix, however, I think anyone would using the human sample would've resembled Max at whatever age fit the user. Also, the clothes would probably be sized down from the user's, or created if it's one of those species that doesn't wear clothing (Gourmands, for example).