In the Kingdom of Locke: Why Aren’t the Duel Spirits Spirits?

"My power alone isn't enough, Little Rock. We have to awaken more allies! Please, you too, call out their names!"

"Wait, what? You mean if I type a name into this thing in front of me, I can summon a spirit for real?"

"What's wrong, Little Rock?"

"Nothing. Stand back. I've got to do something special to this boss..."