So today I was playing on dueling network and the guy I faced had a genex undine on the field and look down be?

so he pulled out a monster tuner that when used to sync all other material monsters have to be water so then he specials out battle fader and syncs the two together and the trys to tell me undine is water type wich I allready know so I'm just wondering was I right to say he couldn't sync with it?