HEYYY
So how did I get so lucky? Well there is a glitch. Btw admins of blooket PLEASEEEE don't patch this. I'm not sure if you could anyways though...
Basically, when you open a box, tap on the best blook you see in the "display window". Tap on it REALLY fast, like 900 cpm (clics per minute). A lot of people can't tap that fast, and the fact that not everyone here has a touch screen laptop makes it even harder to do this glitch/ to prove it. But it is confirmed. I recently got a King, astronaut, and ghost using this glitch, and soon after, on my 5th try, got a King for my friend. This glitch works best on space box, medieval box, and breakfast box for me. It might work better for you on other boxes, but this usually works for all boxes. This isn't guaranteed, but definitely raises the chances of you getting something rare.
cya around ;)