I'm going to take away my little brother's game console
That's mean. Why are you going to take that away?
He refuses to do his school work like he promised to me.
It is difficult to raise a child but it is good to put limits and punish them. It will help them become better people.
I know but it's hard work, I want to let him feel the pain that he will be inflicting on himself for not doing homework.
It definitely is hard to discipline people you love, but with it they'll learn to be very responsible in the end! They may hate you in the moment, but I bet they'd thank you when you're older for looking out for them.