golden hammers

The question is...why did you try unlocking a random blue square? I don't know. I think you should answer that question yourself. Why did you?

Perhaps you should be a little more detailed with your question.

Please be a little more self-explanitory with your question or it won't make any sense. Why would you try unlocking a blue square at random? You might be able to answer this question by yourself. It would be alot easier.

Well to make it short and easy you might get a random stage,trophie,sticker or masterpiece

When you unlock a Blue Square you get what's inside of it.

Once it's been unlocked, the ones next to it on the left an right will
Turn a red color, and usually tell you what you must do in order ot
Obtain the item inside of it.

You can't unlock a blue blue square because it is lock up but the red ones you can get but maket it a hard to get one so you can try to get all of the achivements

Well you're not permitted to use it on those because you have yet to see what the challenge is.once you can see the challenge you can then use the golden hammer.

Also for some challenges such as beat SSE mode you can't use the golden hammer