Hirohiko Araki

Hirohiko Araki is the mangaka who originally created Jojo's Bizarre Adventure, and appears as a bonus boss in the Debug Room. He draws fighters to assist him.

Event
Talking to Araki, found in the same room as Dio, will give the option to refuse to come back later. Choosing "Fight him anyway" to the question after this will begin an extremely difficult fight against him. Araki will periodically summon enemies (by drawing them) in order to increase the fight's difficulty: Dio Brando, Cars, Kira, and Diavolo. If one manages to defeat Araki, they will be rewarded with a Badge of Honor.

As well, every time you defeat Araki, the game increases a hidden counter by 1. If you do not have the Ultimate Debugger in your inventory, the game generates a number from 0 to 999 and checks if the number of times you defeated Araki is greater than or equal to the generated number. If the counter is greater than or equal to the generated value, the Mysterious Manga Artist will give you the Ultimate Debugger.