You can win more BP.
>Tower Tycoon
>After winning 20 and 48 battles consecutively in the Single Battle Room, Tower Tycoon Palmer will offer the player a challenge. He will acknowledge him or her as the friend of his son and ask for a battle. Defeating him yields 20 BP each time.
The more battles you win consecutively, the more BP you earn. It's just like that on the Battle Subway.
Battle Tower