The Robobot Armor retains the basic shape of the Invader Armor, but with details that make it resemble Kirby. It has a predominantly pink frame with pale yellow details and red feet, as well as a Kirby-like face on its front. It has a blunt silver spike on each shoulder, resembling the tip of a screwdriver. The Robobot Armor also has a bronze-colored jetpack strapped behind it. When inside of the Robobot Armor, Kirby gains a pair of goggles that rest atop his head.
The color and design of the Robobot Armor changes when it takes on a different Mode. It can also morph the spikes on its shoulders into various tools, such as a Wrench or a Drill.
Stickers, of which there are over 200, may also be collected during gameplay and can be attached to the Robobot Armor's arms to change its appearance. Two different stickers, one on each arm, may be attached to the Robobot Armor at one time. If no stickers are applied, the Robobot Armor's shoulders feature winged gears with yellow stars in their centers by default.
The Robobot Armor is a durable suit that takes a low amount of damage from most enemies. It is also powerful, as in its normal Mode, it is able to lift, punch and destroy heavy objects and enemies that are otherwise impervious to attack. It can also interact with certain devices by transforming its arm into a wrench or screwdriver; Kirby mainly uses this to twist and remove screws, but it can also activate devices such as cranks.
Pressing B near a Copy Ability-bearing enemy allows the Robobot Armor to scan it and take on a Mode based on that enemy's Scan Spec. There are fourteen Modes (including Kirby: Planet Robobot's final weapon) that the Robobot Armor can take on, each with its own powers and abilities. Copy Abilities and Modes are separate from each other; in other words, if Kirby has a Copy Ability when inside of the Robobot Armor, it does not affect the Mode of the Robobot Armor.
Despite its large size, Robobot Armor is still able to perform a double jump and hover a short distance, dash, ride on a Warp Star and fit in a Cannon. Guarding in Robobot Armor causes the armor to ball up, retracting its arms and legs. However, it cannot truly fly (without the Jet or Parasol Modes), and its large size prevents it from entering certain areas. Robobot Armor will also disappear if Kirby tries to exit a stage while using it.
Areas featuring Robobot Armor tend to feature mechanical stations that allow Kirby to mount and dismount it at will; the station compacts the armor into its spherical form to store it, allowing Kirby to re-enter it later if it is needed again.
List of Modes
The default form of Robobot Armor. It can scan some enemies and gain a Mode based on that enemy's Scan Spec. It is also able to perform a three punch combo attack. It can survive most attacks without receiving damage, which is often used in ways such as jumping on an enemies. However, it can only perform a double jump and a short hover before falling.
Allows the Robobot Armor to send out a small bomb robot that can move forward and climb walls. Three of these robots can be sent out at one time. Charging the move sends a bomb robot soaring through the air.
Gives the Robobot Armor two large saw-blade arms that can be thrown through the air in a circular path, upwards and downwards. It can also punch, charge to send a saw-blade flying ahead and spin the saw-blades.
Transforms the Robobot Armor into a small plane, allowing it to fly freely. Its primary weapon is a rapid-fire laser blast, which can be charged to release powerful missiles both ahead and behind it. It can also perform a dodging maneuver.
Transforms the Robobot Armor into a car-like vehicle, allowing it to charge forward and pierce enemies with lance-like spikes projected from beside its front wheel. It can also change planes at will (if other roads are available) and spin in place, causing a fiery blast.
The Robobot Armor has scanned Meta Knight's ship! It's equipped with the Planet Buster. Capture debris, and press A to fire it!”
— In-game description for Halberd Mode • Kirby: Planet Robobot
The final weapon of Kirby: Planet Robobot is the Robobot Armor's Halberd Mode, which is obtained through analyzing Meta Knight's signature warship. It is used during the final boss battle with Star Dream.
The Halberd Mode is able to fire rapid shots from the Combo Cannon and spin in place to deflect some projectiles that come towards it. It also has the ability to absorb debris created by shooting down Star Dream's attacks; when enough debris is absorbed, the Armor can launch a powerful attack known as the Planet Buster.
At the end of the battle, the Robobot Armor's Halberd Mode is damaged by a shot from the Access Ark, prompting Meta Knight to activate a special eject function that fires the Robobot Armor from the front of the Halberd. At this point, the armor revealed its ability to extend a gigantic drill, which it used to pierce Star Dream's barriers and finish off the rogue machine.
The technique used by the Robobot Armor to scan enemies bears a similarity to the Copy ability's Analyze Beam.
ESP is the only Copy Ability introduced in Kirby: Planet Robobot to have a Robobot Armor Mode.
Mike is the only limited-use Copy Ability that has a Robobot Armor Mode.
When Kirby enters the Robobot Armor, his health meter is completely restored.
The Robobot Armor may be an homage to Gurren Lagann, an anime series featuring a drill-themed mecha that adapts the powers of other machines and organisms. The attack Kirby uses to finish off Star Dream looks extremely similar to the "Giga Drill Break", a famous attack used in Gurren Lagann.
Two pieces of concept artwork for Robobot Armor were merged and became the foundation of Susie's robot suit.
The Robobot Armor is similar to the Ride Armor from the Mega Man X games, as both are mechanical armor suits that can punch enemies and hover while dashing.