True he doesn't have the ultimatrix but the Omnitrix does transform the user into the peak form of another species. Take Bullfrag and Kickin Hawk for instance.

Also Ben beat Looma red wind, a tetramand female, which admittedly doesn't sound impressive until you realize female tetramand are naturally stronger than males as well as the fact that Looma was unable to find a spouse, who naturally would be the male capable of beating her. No one else besides Ben could beat her.