The arena!

The arena is a minigame in nooboy 5.

Area Summary
This is a unlockable level in robloxia city (aka hubworld) and it links to a glass box that has a difficulty meter, once you enter the box you automatically enter a glass box with a difficult meter and the creators voice will say select your difficulty and you pick out of one of the many parts, then you fight another boss.

Unlock Requirements
Complete part 1 (Aka worlds 1-5)

In order to unlock more of the arena you must progress through the other parts of the game and you unlock the other difficulties of the arena as you go.

Characters You Can Unlock in This Area
Compale-Finish Part 1 Bosses

Dark Noob-Finish Part 2 Bosses

Hax0r-Finish Part 3 Bosses

Destroyer-Finish the Part Final bosses

(other parts are TBA)