Originally an Egg-Robo, the Heavy Shinobi received a makeover when he stumbled upon the Phantom Ruby. Decorated as a ninja, the Heavy Shinobi's design reflects that of a green haori with a yellow-triangular cross-pattern chest piece. This yellow cross pattern also appears on his hand and feet cuffs. He has a black bottom torso, red eyes, gray appendages, and green zōri-like forefeet. He also possesses a dark green scarf, keeping with the ninja aesthetic.
The Heavy Shinobi was originally an elite Egg-Robo who handled the most extreme tasks for his creator, Dr. Eggman. After detecting a mysterious energy source on Angel Island, Eggman sent the Heavy Shinobi and the other Hard Boiled Heavies to investigate. Upon reaching Angel Island, he and his troop excavated the energy source, the Phantom Ruby, just as Sonic the Hedgehog and Miles "Tails" Prower arrived. The Phantom Ruby promptly warped space-time around them, transforming the Heavy Shinobi into his ninja attire along with his troop. As a side effect of the ruby, the Heavy Shinobi and his team gained free wills and personalities of their own, though they were driven mad in the process.
The Phantom Ruby transported the Hard Boiled Heavies, along with Sonic, Tails, and a nearby Knuckles the Echidna, to the Green Hill Zone, where the troop fled with the gemstone. After that, the Hard Boiled Heavies planned to keep the Phantom Ruby for themselves. The Heavy Shinobi and his troop soon met Eggman again though, who tried to command the group. When they would not listen though, Eggman snatched the Phantom Ruby from their clutches. The Heavy Shinobi and his troop then fled the scene.
The Heavy Shinobi would be the second Hard Boiled Heavy to fight against Sonic and co. Encountering them in Press Garden Zone, the Heavy Shinobi fought the heroes, only to be defeated, thus forcing him to retreat.
The Heavy Shinobi, now modified into the Phantom Shinobi, would later reappear to fight Sonic and co. again during their fight with the Phantom Egg.
The Heavy Shinobi is said to have gotten a couple of screws loose after receiving newfound power from the Phantom Ruby. Despite this, he, being the ninja of his troop, is elegant and elusive, only striking at the most opportune time. Like the other Hard Boiled Heavies, he wishes to do harm to Sonic, Tails, and Knuckles whether it be by orders from Eggman or by his own, chaotic nature.
Powers and abilities
The Heavy Shinobi can jump in a perfect arc and can also hold his entire weight with one foot, like an actual ninja.
Most of the Heavy Shinobi's strengths come from his weapons. He wields an infinite number of Asterons as shurikens and possesses a sword that can instantly freeze whatever its blade touches.
The Heavy Shinobi is the boss of Press Garden Zone Act 2 and serves as the tenth boss overall in Sonic Mania. He is fought with Sonic, Tails or Knuckles at the end of Press Garden Zone Act 2.
Once the player arrives into a closed off arena, the Heavy Shinobi will appear in the middle of the arena. He will then proceed to jumping around the arena while throwing Asterons from midair, like shurikens. These Asterons will hurt the player if they come in contact with them. If avoided, they will stick to the surface they hit instead. Any stuck Asteron can afterward be destroyed like any regular Badnik; take more than five seconds to do it however, and the Asterons will self-detonate, causing them to release spikes in five directions that can damage the player as well. It should be noted that the more damage the Heavy Shinobi takes, the more Asterons he will throw, with three being his maximum.
To damage the Heavy Shinobi, one must not attack him immediately: patience is key. The player must avoid confronting the Heavy Shinobi head-on the ground, as he will instantly strike the player with his sword, which will instantly freeze the playable character, when they get close. Wait until the Heavy Shinobi jumps into a Spin Jump-like arc. Upon hitting him in midair, he will fall to the floor and become stunned for a few seconds. In this state, the player is able to damage him.
Hit the Heavy Shinobi eight times and he will be defeated, upon which he will jump out of the arena and escape. The player can then proceed to the Capsule and finish the Zone.