Base B is a hulking inmate of Smelly Lid Prison whose baseball-like stitch scars gave him his name. A cocky bully strong enough to bend iron bars barehanded, he was likely turned into a monster by Nyan and later died at the hands of Puri-Puri Prisoner.
Base B carries a heavily muscled frame stitched with seams that run down the sides of his skull and across his chest. A tall mohawk crowns his head, while dark rings circle his eyes and his lips are shaded dark, with piercings in both ears. Inside the prison he went bare-chested with his shirt knotted at the waist over a pair of striped trousers.
Brash and needling by nature, Base B enjoys throwing his weight around and delights in picking on anyone he judges to be beneath him.
A string of surgical enhancements reshaped Base B into a stronger fighter, and fragments taken from the heads of notorious past criminals were sewn into his body. When Nyan tears into Smelly Lid Prison hunting for Puri-Puri Prisoner, Base B and his fellow inmates press the intruder about her intentions. Later they accept the monster cells she offers, warp into monsters, and break out. During the raid, once Puri-Puri Prisoner slays Baquma, the transformed prisoners round on him, branding him a genuine monster and vowing to kill him, yet they cannot lay a finger on his strength.
The hero mourns their fate just as Nyan reappears and rakes his chest open. He then bristles with body hair he calls Angel Bristle Armor, horrifying the inmates, and gives chase through a wall, collapsing rubble that crushes every monsterized prisoner, Base B included. His raw power is well established: he could snap iron bars apart with his bare hands and fought purely with his fists. A prison side story shows that reputation deflating fast, as he shoves the newly jailed Speed-o'-Sound Sonic only to have his shoulder dislocated in an instant.

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Base B is a hulking inmate of Smelly Lid Prison, named for the baseball-like stitch scars marking his skull and chest, who bullies fellow prisoners with his enhanced strength.
Base B was likely turned into a monster by Nyan, who offered monster cells to the inmates of Smelly Lid Prison during her hunt for Puri-Puri Prisoner, and the transformed prisoners broke out afterward.
Base B dies when Nyan collapses the prison walls while fleeing Puri-Puri Prisoner, crushing every monsterized prisoner caught in the rubble, including Base B.
Base B is strong enough to bend iron bars apart with his bare hands and fights purely with his fists, though a prison side story shows Speed-o'-Sound Sonic dislocating his shoulder in an instant.
After Puri-Puri Prisoner kills Baquma, Base B and the other monsterized prisoners surround him and vow to kill him, but none of them can land a hit against his strength.
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