Zeik wasn't the ruler of the d3 but he might as well had been, since the true ruler had flown the coop..or something like that "Hmm a digimon huh. No problem" Zeik would hand the boy a digivice and then a genin ranked card.
"No if you want a digimon. Im going to make you work for it,so it's off to the D3 for you. I'll meet you there young shinobi"
Zeik would take out his digivice and swipe the black card. His body and mind would then be transported to the digitial world. Zeik didnt explain how this worked to the shinobu,he just figured he would catch on