He has a round, stout body with short limbs, similar to his brother. He's green and has a huge stitched mark across his forehead, with screws on each side of his head, resembling Frankenstein's monster. He has spiky, dark green hair on the top of his head. He wears a purple jacket, a green-striped shirt, grey pants, and black shoes.
He is usually seen alongside Icky, implying they may be twins. Boris helps set the table for supper and is said to have gotten the lead role for a school play, together with Icky. They also help Wilhamena notice and try to defeat the ghosts, Spanky and Crudde taking over Rad and K.O.'s bodies. Although he has the ability to, He does not seem to speak at all. He and Icky love to scare others, like the rest of his family (minus Enid), even trying to scare Enid occasionally.
Abilities and Powers
His head can be detached and his eyes can glow in the dark.
|93. "We Are Heroes":||Absent||103. "Big Reveal":||Absent|
|94. "KO, Rad, and Enid!":||Absent||104. "Radical Rescue":||Absent|
|95. "Let's Meet Sonic":||Absent||105. "You're a Good Friend, KO":||Absent|
|96. "TKO Rules!":||Absent||106. "Let's Get Shadowy":||Absent|
|97. "K.O. vs. Fink":||Absent||107. "Red Action 3: Grudgement Day":||Absent|
|98. "Chip's Damage":||Absent||108. "Carl":||Absent|
|99. "The K.O. Trap":||Absent||109. "Dendy's Video Channel":||Absent|
|100. "Whatever Happened to... Rippy Roo?":||Absent||110/111. "Let's Fight to the End":||Background|
|101. "Planet X":||Absent||112. "Thank You for Watching the Show":||Absent|
|102. "Deep Space Vacation":||Absent|
- His name is based off Boris Karloff, the first actor to play Frankenstein's monster.
- He was designed by Stevie Borbolla.
- He and his brother Icky attend "Ghoul School", implying that they do not go to Lakewood Public School with K.O..