(a.k.a. Laser Robot.)
TYPE: Electric, Mechanical.
AFFILIATIONS: Koopa Troop.
CLOSE RELATIVES: None.
SKILLS AND ATTACKS: Fire lasers.
STRENGTHS: Invincible to attacks on the outside.
WEAKNESSES: Jumping, star bits
Sentry beams were first manufactured by Bowser as he went into space. Bowser thought he could outsmart Mario with completely new enemies and its attack pattern of shooting circular lasers. They are purple, and have a spot on their head that when jumped on releases a coil that Mario uses to reach new heights.
Frustrated by the design flaw that allowed Mario to get higher, the Koopa Troop designed yellow versions with spikes that had to be dodged. Then, the troop designed the ultimate form: a metallic grey model that shot laser blasts from its mouth.