Oh good. Both of them don't like to lose. This will be amazing then.

dont worry about it
im pretty sure youll know
just imagine were on the same wavelength then bam
dave wants to battle with some unsuspecting foe
gotta get to him to get there battle on like real bad ass mother fuckers

He'll probably make sure he has a general idea where Sonic is most of the time. They'll probably have to train sometimes, although the fact that he'll be using a broadsword means they aren't at such a disadvantage as if he somehow got someone with a bow or long range weapon