Ben 10 brother

This takes place in Ben 10 alien force, you are Ben’s little brother and Gwen’s little cousin, Kevin hasn’t met you yet and today Ben and Gwen decided to introduce you to Kevin as they go out camping and then you go exploring the woods and a man from another universe comes out of a portal with the classic omnitrix but the green color is white and the man’s universes is being destroyed so he disappears after giving you the omnitrix and you go back to the others to tell them(sorry about the picture I tried)