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Monstro

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IsaacHDIsaac Rebirth

Monstro-text

260x185-400px-Monstro.svg

Boss Monstro


Official artwork by Edmund McMillen
Statistics
Type
Health
Damage
Boss
250
Half heart/Full heart
Floor(s)
Basement
Related Bosse(s)
Monstro II
Gish
Effective Item(s)
Doctor's Remote
Bombs
Dropped Item(s)
Common Drops
WotL Common Drops

Monstro (also referred to as "The Hairlip" in the artbook) is a slow-moving but hard-hitting boss, commonly encountered in the Basement.

Description

Original-Monstro
Monstro appear as a large, fleshy lump with round, beady eyes and a pale-skin. The most noticeable-known feature is a cleft-lip that he sports with, and a wide mouth with 6 crooked teeth (one from the left is larger than the others) and large teeth gums. He also appears to be missing one of his teeth from the left side. His large tongue can be seen while spitting out bullets.

Behavior

Monstro ingame

Monstro in Rebirth.

He will semi-randomly switch between hopping towards the character, spitting a burst of blood tears (noticed by his "about-to-sneeze" expression), or launch into the air and land at the spot the player was standing in when he went up along with blood shots fired in many directions when he hits the ground. 
  • The distance between the character and Monstro will not influence the attack he will choose, he switches between them at will. Therefore, they'll want to stay at medium range to retain maximum flexibility. The blood shot spray looks nasty, but the shots have arcs that often go over their head.
  • It's also possible to circle around Monstro while staying at a short distance. This way, they don't have to worry about his shots, but his small leaps become a bit more dangerous.
  • Despite his bulk, Monstro moves around a fair bit; area of effect items (like Mr. Boom, Lemon Mishap, or Doctor's Remote) will not be very effective unless they get lucky on placement. Doctor's Remote, however, works somewhat well as the player can use mouse clicks to stay on target with Monstro. Try to wait until he launches into the air, then move and aim where they were standing when he lept. Use his shadow to track where he will land.
  • Regular bombs take large chunks out of his health, but if he decides to launch you may end up wasting the bomb. An easy way to use area of effect items is when Monstro makes a huge jump, he will land approximately at your last position before he jumped, so just use the item before moving.
  • Original-Monstro Last Will

    Monstro from Isaac's Last Will.

    If Isaac is down to one heart, avoiding damage becomes a number-one priority as some of Monstro's shots (the bigger ones) can deal up to a full heart of damage.
  • For some people, it's hard to tell where he is when jumping in the air, so homing shots can help to predict his landing. Isaac can sometimes tell by the shadow that Monstro's body makes in where he will land, but mainly, he only lands where Isaac current position was/is.
  • It's possible to run underneath Monstro while he is "hopping". This can make shooting a bit easier.
  • Pay attention. If Monstro uses his blood spray while Isaac is cornered, look for an opening. There's an opening in every barrage Monstro throws at him, so use this to Isaac's advantage.

Champion Variants

Red

Red Monstro

This version is much smaller and has less health. An additional Monstro shows up, and you'll have to battle both of them simultaneously. In boss rooms, there will be two and in normal rooms in later levels, one will be added to the amount that would spawn in the room by default. Obviously, when smaller, it's harder to stay still and maintain fire, and with two or three of them present, it's best to run in a circle around them and never fully stop moving unless they're both just hopping around.

Grey

Monstro alt Black

This champion is slightly larger and has more health. He can't launch himself into the air, and uses his shot attacks much more often.

Eternal

Appears during Hard Mode, Monstro vomit lasts longer, shooting more disorganized projectiles. Similar to Blastocyst, he splits into 2, each splitting into 2 more before his defeat.

Trivia

  • Page 9

    Monstro in the Artbook.

    From one of the sketches of the artbook, Monstro was going to possess with 8 teeth rather than 6 while still missing one of his tooth from the upper jaw.
  • Monstro appears in the demo of the original game.
  • Monstro possesses a cleft lip, or "harelip", a common birth defect.
  • The name Monstro means "monster" in Portuguese.
  • According to Edmund McMillen from the artbook at page 1, Monstro is referred as "Gish with a hairlip", meaning that Monstro is based on the playable character from Gish, one of Edmund's previous games.[1]
  • One of his teeth is missing, possibly referring to the item Monstro's Tooth, however said item is disabled when fighting him.
  • Monstro in Rebirth look much bigger than from the original game.
  • From the original game, Monstro leaves a trail of blood puddles (not creepers) while hopping. He no longer does so in Rebirth.
  • Monstro trailer

    Monstro as he appear in the Afterbirth trailer.

    Monstro appeared in the first Afterbirth trailer.
  • It is possible to have Monstro shove the character out of the boss room. If he lands on them when they're next to the boss door, they can sometimes clip through it. (Only proven with original game without the Wrath of the Lamb DLC.)
  • From the artbook at page 10, Monstro's attack after smashing to the ground is a 8-way bullet attack rather than bursting ones. This attack method was never displayed and later used for his posthumous counterpart Monstro II.
  • Monstro's appearance is very similar to SnackOLantern, a main character of a mini-game by the same name posted by Edmund on Newgrounds in 2003.

Sprites

Videos

References


Bosses
Regular Bosses
Blastocyst button

Blastocyst
Brownie
Chub button

Chub
Daddy Long Legs button

Daddy Long Legs
Dangle
Dark One button

Dark One
Dingle button

Dingle
Duke of Flies button

The Duke of Flies
Fallen button

The Fallen
Fistula button

Fistula
Gemini button

Gemini
Gurdy button

Gurdy
Gurdy Jr button

Gurdy Jr.
Gurgling button

Gurglings
Haunt button

The Haunt
Larry Jr button

Larry Jr.
Little Horn
Loki button

Loki
Mama Gurdy button

Mama Gurdy
Mask of Infamy button

Mask of Infamy
Mega Fatty button

Mega Fatty
Mega Maw button

Mega Maw
Monstro button

Monstro
Mr Fred button

Mr. Fred
Peep button

Peep
Pin button

Pin
Polycephalus button

Polycephalus
Rag Man
Scolex button

Scolex
Turdlings
Widow button

Widow
Posthumous Bosses
Adversary button

The Adversary
Blighted Ovum button

The Blighted Ovum
Bloat button

The Bloat
Cage button

The Cage
Carrion Queen button

Carrion Queen
The Forsaken
The Frail
Gate button

The Gate
Hollow button

The Hollow
Husk button

The Husk
Lokii button

Lokii
Monstro II button

Monstro II
Teratoma button

Teratoma
The Stain
Wretched button

The Wretched
Alternative Bosses
CHAD button

C.H.A.D.
Gish button

Gish
Sister Vis button

Sisters Vis
Steven button

Steven
Triachnid button

Triachnid
Harbingers
Conquest button

Conquest
Death button

Death
Famine button

Famine
Headless Horseman button

Headless Horseman
Pestilence button

Pestilence
War button

War
Final Bosses
XXX button

???
Hush
Isaac button

Isaac
It Lives button

It Lives
Lamb button

The Lamb
Mega Satan button

Mega Satan
Mom button

Mom
Mom's Heart button

Mom's Heart
Satan button

Satan
Ultra Greed
Minibosses
Seven Deadly Sins
Envy button

Envy
Gluttony button

Gluttony
Greed button

Greed
Lust button

Lust
Pride button

Pride
Sloth button

Sloth
Wrath button

Wrath
Seven Super Deadly Sins
Envy button

Super Envy
Super Gluttony button

Super Gluttony
Super Greed button

Super Greed
Super Lust button

Super Lust
Super Pride button

Super Pride
Super Sloth button

Super Sloth
Super Wrath button

Super Wrath
Ultra Pride button

Ultra Pride
Angels / Demons
Krampus button

Krampus
Angel button

Gabriel
Angel button

Uriel
Angel button

Fallen Angels
LEGENDS: The Binding of Isaac bosses are yellow. Wrath of the Lamb bosses are teal. Rebirth bosses are orange. Afterbirth bosses are crimson. Afterbirth † bosses are violet.

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