A sudden burst of excitement filled the crowd when they saw the fight. At this point, everyone was already aware that Satoshi wouldn't be using his tamed beasts in the match.
In other words, he's pretty much powerless going against a high school superhero. It was the greatest entertainment for everyone watching the match.
Then again, most of them felt bad for Satoshi. At the end of the day, controlling his tamed beasts is his superpower so telling him not to use it goes against the rules of a superhero tournament. Some of them even thought of complaining but they knew they couldn't.
This wasn't your regular tournament after all. And most importantly, it was Knighthawk's class they were talking about here. It was his class, his rules.
Principal Sai Tama also had no say in the matter. And quite frankly, he was a bit curious as to how Satoshi would deal with a powerful superhero without the help of his tamed beasts.