Monstro

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Boss Monstro name.png
Boss versus screen image
 
 
Table dividing line 1.png
 
In-game appearance
Table dividing line 2.png
 
Boss
Stage The Basement icon.pngStage Burning Basement icon.png
Challenge Room Icon.pngBoss Challenge Room Icon.pngSuper Secret Room Icon.png
Double Trouble
Stage The Caves icon.pngStage The Catacombs icon.pngStage Flooded Caves icon.png
(With Another Monstro, Added in Afterbirth The Duke of Flies, Larry Jr. or Fistula)
Degraded Boss
Stage The Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
Stage The Womb icon.pngStage Utero icon.pngStage Scarred Womb icon.png
Stage Cathedral icon.png
Stage The Chest icon.pngStage Dark Room icon.png
Table dividing line 3.png
 
Boss Boss
Disambig.png This article is about the boss. For the posthumous version, see Monstro II. For the enemy, see Ministro. For the item, see Lil Monstro.

Monstro is one of the bosses that can appear in The Basement The Basement and the Burning Basement Burning Basement. He is amongst the most common to fight, particularly because he can appear on later floors as an enemy.

Behavior[edit | edit source]

  • Hops towards the player.
  • Coughs up a large amount of disorganized projectiles. The larger projectiles do one heart of damage while the short-ranged small ones do 1/2 heart.
  • Jumps off-screen, aiming to land on top of the player.
    • Fires another set of disorganized projectiles after landing.

Champion Versions Needs to be unlocked[edit | edit source]

  • Grey: 15% larger and has 25% more HP (312.5). Uses projectile volleys much more often and is unable to jump off-screen.
  • Red: Two 25% smaller Monstros, each with 55% less HP than the original one (112.5), replace the normal Monstro.

Gallery[edit | edit source]

Arena[edit | edit source]

Notes[edit | edit source]

  • In the boss room, Monstro can be paired with Black Flies, Attack Flies, Gapers, Hoppers, Frowning Gapers, Mulligans, Added in AfterbirthCyclopias, or Added in Afterbirth †Ministros.
  • When Monstro jumps off-screen, he is cured of all status effects.
  • Monstro can't hop over Obstacles.
    • If Isaac is somewhere that Monstro cannot reach, Monstro will jump in place.
    • If Isaac has flight and is over an obstacle, Monstro will eventually be unable to act at all.
      • While Monstro can hit Isaac with his tear barrage because of its tear height, it is very unlikely.
  • Added in Afterbirth † Monstro can rarely spawn in a room with two Blood Donation Machines.

Trivia[edit | edit source]

  • Monstro appeared in the original The Binding of Isaac.
  • Monstro appears to be missing a tooth which happens to be an item.
  • Monstro is Monster in Portuguese.
    • "Monstro" is a somewhat common mispronunciation of the Spanish word monstruo.


Bosses Boss Monstro.png
Chapter 1
Stage The Basement icon.pngStage The Cellar icon.pngStage Burning Basement icon.png
Blighted OvumDingleThe Duke of FliesFamineFistulaGeminiGurglingsThe HauntLarry Jr.MonstroPinStevenWidowThe FallenThe Headless Horseman
DangleLittle HornRag ManTurdlings
Chapter 2
Stage The Caves icon.pngStage The Catacombs icon.pngStage Flooded Caves icon.png
Carrion QueenC.H.A.D.ChubDark OneGurdyGurdy Jr.The HollowThe HuskMega FattyMega MawPeepPestilencePolycephalusThe WretchedThe FallenThe Headless Horseman
The ForsakenThe FrailThe Stain
Big HornRag Mega
Chapter 3
Stage The Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
The AdversaryThe BloatThe CageThe GateGishLokiMask Of InfamyMonstro IIWarThe FallenThe Headless HorsemanMom
Brownie
Sisters Vis
Chapter 4
Stage The Womb icon.pngStage Utero icon.pngStage Scarred Womb icon.png
BlastocystThe BloatConquestDaddy Long LegsDeathLokiiMama GurdyMr. FredScolexTeratomaTriachnidThe FallenThe Headless HorsemanMom's HeartIt Lives
Sisters VisThe Matriarch
Blue Womb
???
Hush
Chapter 5
Stage Sheol icon.pngStage Cathedral icon.png
SatanIsaac
Chapter 6
Stage Dark Room icon.pngStage The Chest icon.png
???The LambMega Satan
The Void
Stage The Void icon.png
Delirium
Greed Mode
Ultra Greed
Ultra Greed
Ultra Greedier
The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth
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Pickups Pickups Pills Pills Rooms Rooms Seeds Seeds Transformations Transformations Trinkets Trinkets