Theory: Nine killed his bullies.

Unlike Tails, Nine I’m more than certain KILLED his bullies. And let’s face it, if he did, my only complaint is we didn’t get to see them suffer.

Honestly, to me, Nine was the best character in Sonic Prime.

Apart from his trust issues and not willing to make other friends…he is Tails perfected, he is a warrior as well as an inventor, someone who doesn’t rely on Sonic.

I imagine Nine liters his bullies down to his lab, he captured them and preformed nasty experiments on them.