The Bosses are Enemies that Only appears in the Boss Stages of Harror the Robot (from HtR 4)
Harror the Robot 4 Arena[]
Boss 1 (Alpha Boss)[]
- Name: Surveillance Droid MKII
- Habilities: Firing it's Laser and Drops from the Ceiling
- Species: Robot Droid
- Health: Three Blow (Shooting at the Red Fire Shooter)
- Gender: N/A
- Level: Stage 07: Surveillance Droid MKII Alpha Robot
Boss 2 (Final Boss)[]
- Name: GLaDOS (Genetic Lifeform and Disk Operating System)
- Habilities: Shoot at the Player and Fire Lasers
- Species: Artificially Intelligent Computer System
- Health: Five Blows (Three with the Core Launching & Two with an Block Attack)
- Gender: Female
- Level: Stage 14: Genetic Lifeform and Disk Operating System
Harror the Robot 5: Evil Crime Sanity[]
Boss 1[]
- Name: Tradik Trajendi Lord
- Habilities: Move Left and Right, Shoot Bombs, & Jump
- Pinch Habilities: Launching Fire Balls, Fly, & Make Invisiblity
- Species: Enemy Tank
- Health: Five Blows (Launching Water To his Gun with Harror the Robot)
- Gender: Male
- Level: 1-10 10 Boss Stage
Boss 2[]
- Name: Rock the Nanorobot
- Habilities: Jump, Fly, & Dig
- Pinch Habilities: Shoot Skull Arrow,& Fire Ball
- Species: Nanorobot
- Health: Five Blows (Launching to he Bubbles with White the Block )
- Gender: Male
- Level: 2-10 Boss Stage
Boss 3[]
- Name: Mmaassnakke
- Habilities: Move Up & Down
- Pinch Habilities: Move in a Square
- Species: Sky Serpent
- Health: Nine Blows (Shooting to he with Chico Cecho)
- Gender: Female (Formerly Unknown)
- Level: 3-10 Boss Stage
Boss 4[]
- Name: Doctor Crimen Foregu (in an Attack Machine)
- Habilities: Shooting Homing Missiles
- Pinch Habilities: Giant Machine Attack
- Species: Human
- Health: Four Blows (Running to the Machine and the Homing Missiles Explote to the Machine with Emily the Power)
- Gender: Possibly Male
- Level: 4-10 Boss Stage
Boss 5[]
- Name: Drag the Dragon
- Halibities: Shooting Fire Flames, Because is an Dragon
- Pinch Habilities: Flying Like Dragon
- Species: Red Dragon
- Health: Three Blows (Launching Water with the Musicians Robots Jamers: Saxophonist, Bassist, Percussionist, & Pianist)
- Gender: Male (Formerly Unknown)
- Level: 5-10 Boss Stage and Bad Ending
Boss 6[]
- Name: The. Evil. Mule
- Habilities: Move
- Pinch Habilities: Move Fast
- Species: Jelly
- Health: Six Blows (Shooting an Bomb with Mad Mad Gone)
- Gender: None
- Level: 6-10 Boss Stage
Boss 7[]
- Name: Black Block
- Habilities: Jump and Rolling
- Pinch Habilities: None
- Species: Anthropomorphic Black Block
- Health: Seven Blows (Jumping Over he with Flash Juan Axel)
- Gender: Male
- Level: 7-10 Boss Stage
Boss 8[]
- Name: Octopus Monster
- Habilities: Float Moving Underwater
- Pinch Habilities: Shooting Underwater rocks
- Species: Octopus + Monster
- Health: Ten Blows (Launching Flying Rocks to he with Timothy the Thunder)
- Gender: Male
- Level: 8-10 Boss Stage
Boss 9[]
- Name: Female Ghost
- Habilities: Disappearance & Appearance
- Pinch Habilities: Appear Everywhere
- Species: Ghost
- Health: Five Blows (Shooting to she Starblocks anti-ghost with The Siameses Robots: Dodo & Babo)
- Gender: Female
- Level: 9-10 Boss Stage
Boss 10 (Final Boss)[]
- Name: Malvadu the Boss
- Species: Emperor Robot
- First Appearance: Harror the Robot 3 (Only in Ending), Harror the Robot 4 (Mentioned)
- Habilities: Fighting Like Commando
- Pinch Habilities: Airship Assistence
- Health: Twelve Blows (Shooting in a Pipe a Homing Missile with Harror the Robot Players)
- Gender: Male
- Level: 10-10 Boss Stage