By the way, LOVE the game. My favorite game!
Read it again, it says "scrubs". As in noobs, or other bad players .
Yeah, what I did was make a YTP reference with Sean saying, "After you floor all the scrubs in my gym..."
The original quote was, "After you scrub all the floors in Hyrule..."
So, it was a pun. But yeah, just beat all the trainers in his gym to continue.