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Computer Virus

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KSS Computer Virus
Kirby Super Star artwork
Computer Virus
Name (JP) バトルウィンドウズ (Batoruu~indouzu)
- Meaning for "Battle Windows"
In Games
KSSU logo
Copy abilityNone
Points Given12000 (Magician), 15000 (Evil Knight), 20000 (Great Dragon) (47000 altogether)
You gained XXX EXP! (Not that it matters.)
— Computer Virus • Kirby Super Star Ultra

Computer Virus (also called Battle Windows) is a boss in Kirby Super Star and its remake, Kirby Super Star Ultra. This boss is a satirical parody of typical, turn-based, RPG (role playing game) battles. In addition to being fought in a turn-based manner, the boss also 'sums up' what happens turn-by-turn (for example, if Kirby is hurt by an attack, the top window states that "Kirby is hurt" and so on. It also says how much damage an enemy has received).

The Computer Virus is a strange, surrealistic entity that resembles three computer operating system windows, and attacks Kirby using a collection of three different monsters each time it appears. During the fight, the monsters it summons stay concealed within the computer screen. After it uses one of its attacks, it will step down from the battle screen for a short amount of time, giving Kirby his only chance to fight back. If Kirby doesn't have any ability, the stars (plus other projectiles, but not all of them) that the virus attacks with can be swallowed and spit out at the enemy. Kirby may occasionally have the option to forfeit his turn to grab a randomly-generated Copy Ability pedestal. Health varies from creature to creature, but health is always increased when Kirby begins the battle with a Helper by his side, or when a Helper fights by itself. Kirby's guard move will block all attacks except for:

  • Any ice attacks
  • Evil Knight's "sword" and knives
  • Great Dragon's wing flapping and talons.

Most attacks are better off guarded, but a few are better off being avoided altogether.

Computer Virus appears as the boss of The Great Cave Offensive level "Crystal Area", and also as the boss of the Milky Way Wishes level "Halfmoon". It also appears in The Arena. It also appears in Kirby Super Star Ultra's new sub-games Helper to Hero (where it has dark purple versions of the three strongest creatures), and Meta Knightmare Ultra.

In The Great Cave Offensive, Computer Virus uses Slime, Puppet, and Magician. In Milky Way Wishes (along with The Arena and Helper to Hero), Computer Virus uses Magician, Evil Knight, and Great Dragon. In Meta Knightmare Ultra, Computer Virus is actually fought twice, since the game takes place in both The Great Cave Offensive and Milky Way Wishes.


The Computer Virus has five separate creatures that can be fought, though it will only summon three of them per fight. In the original Kirby Super Star, each creature is still, but in the remake, the creatures are animated a little. After each creature attacks, it will step down from its window, allowing Kirby (and a Helper, if Kirby has one) to attack it.



The Slime

  • Description: The first of all minions to be fought. The Slime is a sentient (and small) ball of gooey, green, primordial slime. The Slime has two little eyes.
  • Moves: The Slime's attacks are all very weak. It sleeps, tries to escape (which always fails), looks surprised, and every so often, he will actually attack with a single star (if even). Very rarely, he will also "call for a pal". This, however, does nothing.
  • Appearance(s): The Great Cave Offensive.

Dancing Doll / Puppet

Crazed clown

The Puppet

  • Description: The second of all minions to be fought. The Puppet is strange, wooden, and clown-like, with a dazed look on its face. It wears a light blue suit and red and white striped pantaloons.
  • Moves: Like the Slime, The Puppet's attacks rarely do any damage. It will laugh, scream, and dance at Kirby (none of which do anything). Its only real attack is when it fires only one star at Kirby. It may try to self-destruct for no reason, but it always fails. It can cast a hex, but that does nothing whatsoever.
  • Appearance(s): The Great Cave Offensive.

Witch / Magician


Both forms of the Magician

  • Description: The third minion in The Great Cave Offensive (the first in other versions) to be fought. She is a little stubby witch who is garbed in blue (purple in Helper to Hero) sorcerer clothing. She wields a magical cane as a weapon. She is the first enemy to actually attack each time.
  • Moves:
    • Main attack - The Magician shoots three stars at Kirby. Can be blocked.
    • Ice Spell - The Magician shoots an icicle at Kirby, which will freeze him and probably make him lose his ability, if he has one. It cannot be blocked, but the guard move reduces damage and prevents freezing. If Kirby is using Mirror, he will be able to reflect the attack and prevent any damage.
    • Fire Spell - The Magician shoots a stream of fire at Kirby. It will either be four bigger, slower blasts, or six smaller, faster blasts. This can be blocked.
    • Guard Spell - The Magician begins to flash. All damage done to the magician on Kirby's next "turn" will be reduced by 75%.
  • Appearance(s): All versions of Computer Virus.

Evil Knight


Both forms of the Evil Knight

  • Description: The second monster in the version to be fought. He is the second strongest of the five summoned creatures. His helmet resembles a skull, and he is garbed in purple (black in Helper to Hero) armor. He is in a poised stance and wields a sword and shield.
  • Moves:
    • Main Attack - The Evil Knight shoots five slow stars at Kirby. Can be blocked.
    • Bring Down Sword - The Evil Knight shoots spinning crescent-shaped blades at Kirby, or two if his health is low. It cannot be blocked, but guarding will reduce damage.
    • Freezing Slash - The Evil Knight shoots an icicle at Kirby which will freeze and damage him. It cannot be blocked, but guarding will reduce damage and prevent freezing.
    • Knife Throw - Several knives fall from the top of the screen. At full health, he'll only throw six; at about half health, he'll throw more and at low health, he'll throw even more. The knives will not hit the edges of the screen - standing there will prevent all damage. Knives cannot be blocked, but a guard move will reduce damage.
    • Store Up Power - The Evil Knight begins to flash. The Evil Knight's next attack will be more powerful.
    • Raise Shield - The Evil Knight begins to flash. All damage done to the Evil Knight on Kirby's next "turn" will be reduced by 75%.

Guarding with mirror deflects all attacks.

Red Dragon / Great Dragon

Great dragon2

Both forms of the Great Dragon

  • Description: The third minion fought in this version. The Great Dragon is certainly the strongest of the five summoned creatures. He is a red (changed to orange in the remake, hence the name change, and purple when a helper alone fights it) dragon with horns, wings, fangs, and claws.
  • Moves:
    • Main Attack - The Great Dragon shoots three very fast, bouncy stars that are almost impossible to avoid at Kirby. Can be blocked.
    • Fiery Breath - The Great Dragon shoots a stream of fire at Kirby. It will either be four bigger, slower blasts shaped like "X"s, or six smaller, faster blasts. This can be blocked, or avoided by being under The Great Dragon, since it cannot attack under itself.
    • Petrification - The Great Dragon begins to flash. All damage done to the Great Dragon on Kirby's next "turn" will be reduced by 75%.
    • Flap Wings - A bunch of small, dangerous crescents fly across the screen from left to right, along with puffs of air that don't do damage. It cannot be blocked, but guarding will reduce damage. Floating to the top-side of the screen will allow Kirby to avoid damage due to the fact that the crescents do not go there. Crescents can be destroyed by attacks.
    • Slash with Talons - The Great Dragon shoots several spinning crescents in a clockwise circular pattern, starting from the top. It cannot be blocked, but guarding will reduce damage. The attack has a short range, so all Kirby has to do is move to either side of the arena.

Guarding with Mirror deflects all attacks.

  • Appearance(s): Milky Way Wishes, The Arena, Helper to Hero.


  • The creatures are all pseudo-medieval/fantasy-themed, which is what RPGs often center around. The order of the five enemies is often typical within an RPG. The Slime and the Puppet can be seen as field enemies, weak enemies that roam the overworld map. The Magician and Evil Knight are more specialized enemies found in dungeons, and the Great Dragon can be seen as a boss or an enemy in the final dungeon (however, the use of the indefinite article 'a' when it is introduced seemingly implies the latter). One of the more interesting things about this, though, is that the Slime or enemies similar to it are staples in RPGs.
  • After defeating Computer Virus in The Great Cave Offensive, Milky Way Wishes (and Meta Knightmare Ultra in the remake), one window will begin giving the player "experience points" for humorous things (such as Puffiness or Mask Shine for example, depending on whether the player is assuming the role of Kirby or Meta Knight respectively). The points given have no effect on Kirby or Meta Knight, however. Friendship/Teamwork will also be increased if there's a Helper with Kirby or Meta Knight, respectively.
  • When fought in The Arena, Computer Virus closes its windows instantly after you defeat it, instead of giving useless status experience. However, in Helper to Hero, it doesn't close instantly, but rather says "The Helper defeated all the enemies!" before closing, as if the computer is surprised that the Helper could defeat the enemies single-handedly.
  • This is the only boss in Kirby Super Star whose name completely changed between the Japanese and English versions - The Arena spells the name "Battle Windows" in plain English (while Marx is more accurately translated as "Mark," his name was also spelled "Marx" directly in English). The reason the name was changed may be to avoid confusion with certain PCs.
  • The battle music for Computer Virus is a pseudo-8-bit remix of the normal boss theme in Kirby Super Star/Kirby Super Star Ultra.
  • In the SNES version, the windows take their appearance from an actual operating system: Apple's classic Mac OS. In the DS version, the windows were given more of a generic appearance.
  • WiiU screenshot TV 0109D

    The typo.

    In The Arena battle in the SNES version, when picking up a Ninja Copy Essence, the Message box mistakenly states "Kirby becames a ninja!"
  • In Kirby Super Star, the text overlaps Kirby should he be floating in its area.



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