Hacker Corps is a specialized group of hackers in Danball Senki series.
Background[]
The Hacker Corps are only loyal to the King (Champion) of Akhibara Kingdom LBX Tournament. They are extremely good hackers.
In season 2 episode 52, they return sending a message to the world.
"O-Legion, the LBX causing chaos around the world. Its manipulator is a mysterious entity named Mizel. Mizel has been acrrying out his improvement through destruction. However, do you know of those who are fighting around the world to stop him? They're top level LBX players, fighting under Ban Yamano and Hiro Oozora, aided by some of the world's greatest scientists such as Junichirou Yamano. To everyone that reads this message, please, lend us your strength. To fight against O-Legion, we need you to send all the LBX-related data you have to Tiny Orbit. Tos ave the world, and to bring LBX back to the children".
That message inspires people from across the world to send data to Junichirou Yamano in order create a new LBX to battle Mizel and his corrupted O-Legion.