you came to a dimension where you thought there was nothing strange, so you would walk through the forest looking for Ben Tennyson, when you arrived at the place where Ben Tennyson was sleeping, you would slowly open the tent and see Grandpa Max and Ben sleeping peacefully, when you see Well, Ben, you would see that he wouldn't have the omnitrix, which would surprise you a lot

???: GET AWAY FROM THERE!!

you would be attacked by a female version of XLR8, you would be surprised to see that someone else had the omnitrix, so you would attack the female XLR8 and when you manage to defeat her, she would detransform and show herself as Gwen Tennyson who had her own Omnitrix

Gwen: I won't let you hurt my family! stands up and is about to transform into another alien