Enemies

Introduction

The damage of an enemy means the amount of damage contact with the enemy's body will deal to Samus. For damage values on this page, "P" stands for Power Suit, "V" stands for Varia Suit, and "G" stands for Gravity Suit.

The damage values for enemy attacks and bosses are currently not listed. Check out the Damage Sources page for that information.

For Space Pirates, the word in parenthesis further indicates the kind of Space Pirate it is. For Tourian, "All" means that the data applies to any of its kind (standing, wall, fighting).

How Drops Work

To make understanding this information easier, item drops will be explained as existing within the following tiers:

Tier I - Small Energy, Large Energy, Missile, "nothing"

Tier II - Super Missile, Power Bomb

Tier I items affect whether each other item in Tier I will drop proportionally to the size of their drop rates. For example, a Waver has a 2%, 24%, 24%, 24%, 24%, and 4% chance to drop nothing, a Missile, a Small Energy, a Large Energy, a Super Missile, and a Power Bomb respectively.

If you are full on Missiles but are not at full energy, the drop rates will change as follows:

Nothing - 2% -> 4%
Small Energy - 24% -> 35%
Large Energy - 24% -> 35%

The 24% chance was distributed at a ratio of 2 : 11 : 11.

If you are at full energy but are not full on Missiles, the drop rates will change as follows:

Nothing - 2% -> 4% -> 6%
Missiles - 24% -> 46% -> 68%

The 24% chances were distributed individually at a ratio of 2 : 22.

Tier II items can also affect the drop rate of Tier I items. Having full Super Missiles or Power Bombs will cause their drop rates to be evenly distributed through Tier I.

For example, if you are full on Super Missiles but are missing both energy and Missiles, then kill a Waver (drop rates referenced earlier), the drop rates will change as follows:

Nothing - 2% -> 8% (+6)
Missiles - 24% -> 30% (+6)
Small Energy - 24% -> 30% (+6)
Large Energy - 24% -> 30% (+6)
Power Bombs - 4% -> 4% (+0)

The chance for Power Bombs to drop will not increase as unfortunately, the chance for Tier II items to drop cannot be increased by any means. For example, if you are full on everything except Power Bombs and kill a Metroid (which has a 12% chance to drop Power Bombs), that 12% chance is not increased - effectively, everything is converted to nothing. Assuming the probability of occurrence is the same for every low byte of the RNG address' value from 1 (instead of 0) to 255, which generally would be a false although just slightly inaccurate assumption since generally - e.g. when the random number generation process is caged in a finite cycle of RNG values with fixed order of occurrence - the frequency at which these different low bytes occur is not constant but variable and hence dependent on the particular low byte value, the drop rates for Super Missiles and Power Bombs are constant - they are not affected by Tier I, but can affect Tier I as explained previously.

If an enemy does not have a chance to drop "nothing", then the drop chance will be directly converted (spread) between items. For example, if you killed a Zeela while at full energy but missing Missiles, then the drop rate of Missiles would change from 50% to 82%. In that scenario, if you were full on Super Missiles (or had not yet obtained them), then the drop rate would instead become 102% (100%).

The specific drops that spawn are determined on the frame the enemy's explosion animation occurs (or in the case of bosses, the frame the drops themselves spawn). This information is only reasonably useful for tool assisted speedruns where you have the ability to manipulate drops by killing an enemy on different frames until it drops what you want.

Bosses will drop "nothing" if Samus has full energy and full Missiles on the frame their drops spawn; otherwise, bosses are incapable of dropping "nothing", and being capped on one of either energy or Missiles will cause the drop chance to entirely roll over to the other. Certain bosses are incapable of dropping small energy upon their defeat.

The amount of items that certain enemies will drop changes depending on how they are killed. For example, if you destroy a Geruta, a Magdollite, and a Metroid with a Power Bomb, they will drop up to two items, three items, and one item (instead of up to one item, one item, and six items) respectively. These are the only cases of death via a Power Bomb causing a different amount of drops than the typical amount.

Finally, here is an explanation of drop generation by itsblah using hexadecimal values.

Health Bomb

In the event that your total energy (including reserves) goes below 30, it will cause all enemies in the game that drop items to attempt to provide you with energy instead of any other drop until your energy goes at or above 50 and another drop is generated.

If you receive an energy drop that puts you at or above 50 energy, but then dip below 50 energy again (even if you dip below 50 energy but not 30 energy) before the next drop is generated, you will still receive energy as the next drop. This is because the game only changes the flag for energy drops upon a drop being generated.

Although the low energy alarm does begin at 30, the game will not force energy drops upon you until it goes below 30.

As described in the technical explanation linked above, during a health bomb there is a small chance of some enemies dropping Nothing even if they normally cannot drop Nothing.

Why is the drop rate out of 102%?

The game stores nearly everything as a hexadecimal value and the drop chance for an enemy can have 2 characters at most. Theoretically, this means that if an enemy were only able to drop nothing, the chance of it dropping nothing would be FF accordingly. FF as a hexadecimal value equals 255 in the standard decimal system.

To make the numbers more readable, every number after being converted into decimal is then divided by 2.5. 255 divided by 2.5 equals 102, which is close enough to 100. Additionally, all of the numbers only go to the tenths place (at most) when dividing by 2.5.

To give an example, a Sciser has a 40% chance (out of 102%) of dropping big energy, and if it were out of 100%, then the chance would be 39.2157%, which is a negligible difference.

Crateria

Name	Damage (P/V/G)	Health	Nothing	Small Energy	Big Energy	Missile	Super	Power Bomb	Notes
Alcoon	50/25/12	200	0	0.4	0	0	0	101.6
Beetom	10/5/2	50	0	0.4	0	0	0	101.6	Damages every 64 frames
Boyon	10/5/2	1000	52	8	4	34	2	2
Choot	80/40/20	100	2	24	24	24	24	4
Geemer	5/2/1	15	0	22	10	68	2	0
Geemer	5/2/1	15	40	52	8	0	0	2
Geemer	5/2/1	15	40	52	8	0	0	2
Kago	0	1600	2	20	36	28	8	8	Have to kago inside to take this damage
Kamer	0	20	2	32	32	32	2	2
Kihunter	20/10/5	60	30	20	12	32	4	4
Mellow	8/4/2	9	28	12	28	32	2	0
Reo	15/7/3	45	16	12	32	34	4	4
Ripper	5/2/1	200	26	32	8	32	2	2
Ripper 2	10/5/2	200	0	0	0.4	0	101.6	0
Sciser	120/60/30	200	0	0.4	40	0	0	61.6
Skree	10/5/2	15	54.8	8	1.2	34	2	2
Skultera	80/40/20	300	28	32	12	28	2	0
Space Pirate (standing)	15/7/3	20	0	20	48	32	2	0
Space Pirate (standing)	20/10/5	90	18	20	12	40	8	4
Space Pirate (wall)	15/7/3	20	0.4	4	18	78.8	0.4	0.4
Tripper	0	20	2	32	32	32	2	2
Waver	10/5/2	30	2	24	24	24	24	4
Yapping Maw	0	20	2	32	32	32	2	2
Zeb	6/3/1	9	2	24	24	24	24	4
Zebbo	20/10/5	30	0	0	56	4	40	2

Brinstar

Name	Damage (P/V/G)	Health	Nothing	Small Energy	Big Energy	Missile	Super	Power Bomb	Notes
Beetom	10/5/2	50	0	0.4	0	0	0	101.6	Damages every 64 frames
Boulder	40/20/10	20	102	0	0	0	0	0
Boyon	10/5/2	1000	52	8	4	34	2	2
Cacatac	20/10/5	60	0	0	0.4	0	101.6	0
Fireflea	4/2/1	20	0	0	0.4	0	0	101.6
Geega	10/5/2	10	2	24	24	24	24	4
Kihunter	20/10/5	60	30	20	12	32	4	4
Metaree	50/25/12	50	24	32	10	32	2	2
Mini-Kraid	100/50/25	400	0	0	0.4	0	101.6	0
Puyo	60/30/15	100	2	24	24	24	4	24
Reo	15/7/3	45	16	12	32	34	4	4
Ripper	5/2/1	200	26	32	8	32	2	2
Ripper 2	10/5/2	200	0	0	0.4	0	101.6	0
Skree	10/5/2	15	54.8	8	1.2	34	2	2
Skultera	80/40/20	300	28	32	12	28	2	0
Sidehopper	80/40/20	320	40	8	8	22	22	2
Sm. Sidehopper	20/10/5	60	40	8	16	34	2	2
Space Pirate (standing)	20/10/5	90	18	20	12	40	8	4
Waver	10/5/2	30	2	24	24	24	24	4
Yapping Maw	0	20	2	32	32	32	2	2
Zeb	6/3/1	9	2	24	24	24	24	4
Zebbo	20/10/5	30	0	0	56	4	40	2
Zeela	10/5/2	30	0	22	10	50	20	0
Zero	40/20/10	50	0	0.4	0	0	0	101.6

Wrecked Ship

Name	Damage (P/V/G)	Health	Nothing	Small Energy	Big Energy	Missile	Super	Power Bomb	Notes
Atomic	40/20/10	250	0	0	66	32	2	2
Bull	10/5/2	100	0	0	2	0	0	100
Covern	60/30/15	300	0	20	38	28	8	8	Respawns after being destroyed
Kamer	0	20	2	32	32	32	2	2
Kihunter	60/30/15	360	16	22	32	4	24	4
Skultera	80/40/20	300	28	32	12	28	2	0
Workrobot	0	800	2	32	32	32	2	2

Maridia

Name	Damage (P/V/G)	Health	Nothing	Small Energy	Big Energy	Missile	Super	Power Bomb	Notes
Bull	10/5/2	100	0	0	2	0	0	100
Cacatac	20/10/5	60	0	0	0.4	0	101.6	0
Choot	80/40/20	100	2	24	24	24	24	4
Evir	100/50/25	300	2	32	32	32	2	2
Kame (Tatori)	200/100/50	20000	2	32	32	32	2	2
Kame Baby	0	20000	2	32	32	32	2	2
Menu	60/30/15	100	32	28	8	32	2	0
Mochtroid	90/45/22	100	2	24	24	24	24	4	Damages every 80 frames, keeps track of contact
Oum	0	300	30	28	12	28	2	2
Owtch	100/50/25	20	2	32	32	32	2	2
Powamp	100/50/25	10	0	0.4	0	0	101.6	0
Puyo	60/30/15	100	2	24	24	24	4	24
Sciser	120/60/30	200	0	0.4	40	0	0	61.6
Shaktool	120/60/30	300	2	32	32	32	2	2
Skultera	80/40/20	300	28	32	12	28	2	0
Space Pirate (standing)	160/80/40	300	0	20	48	32	2	0
Space Pirate (wall)	160/80/40	300	28	12	28	32	2	0
Yard	100/50/25	10	32	34	32	0	0	4
Zebbo	20/10/5	30	0	0	56	4	40	2
Zoa	15/7/3	40	2	0	40	28	28	4

Norfair

Name	Damage (P/V/G)	Health	Nothing	Small Energy	Big Energy	Missile	Super	Power Bomb	Notes
Alcoon	50/25/12	200	0	0.4	0	0	0	101.6
Boulder	40/20/10	20	102	0	0	0	0	0
Cacatac	20/10/5	60	0	0	0.4	0	101.6	0
Dessgeega	160/80/40	800	38	32	8	20	2	2
Dragon	24/12/6	300	30	20	20	28	2	2
Fireflea	4/2/1	20	0	0	0.4	0	0	101.6
Fune	10/5/2	20	2	32	32	32	2	2	Have to kago inside to take this damage
Gamet	16/8/4	20	2	24	24	24	24	4
Geemer	5/2/1	15	40	52	8	0	0	2
Geruta	60/30/15	120	2	24	24	24	24	4
Holtz	120/60/30	900	0	0	48	20	20	14
Kago	0	1600	2	20	36	28	8	8
Kamer	0	20	2	32	32	32	2	2
Kihunter	200/100/50	1800	8	14	48	4	24	4
Magdollite	40/20/10	20	2	32	32	32	2	2
Mella	16/8/4	30	28	28	12	32	2	0
Metaree	50/25/12	50	24	32	10	32	2	2
Multiviola	50/25/12	90	28	28	12	30	2	2
Namihe	10/5/2	20	2	32	32	32	2	2	Have to kago inside to take body damage
Puromi	64/32/16	40	102	0	0	0	0	0
Puyo	60/30/15	100	2	24	24	24	4	24
Ripper 2	10/5/2	200	0	0	0.4	0	101.6	0
Ripper 2	10/5/2	200	0	0	0.4	0	101.6	0
Skree	10/5/2	15	54.8	8	1.2	34	2	2
Sm. Dessgeega	80/40/20	120	0	0.4	0	0	0	101.6
Sova	20/10/5	40	10	32	28	12	20	0
Space Pirate (standing)	80/40/20	200	78	4	8	8	2	2
Space Pirate (standing)	200/100/50	900	0	20	48	32	2	0
Space Pirate (wall)	200/100/50	900	78	4	8	8	2	2
Space Pirate (fighting)	100/50/25	1800	0	0	60	2	40	0
Squeept	50/25/12	300	2	20	20	20	20	20
Tripper	0	20	2	32	32	32	2	2
Viola	15/7/3	30	0	0.4	0	0	0	101.6
Waver	10/5/2	30	2	24	24	24	24	4
Zebbo	20/10/5	30	0	0	56	4	40	2

Tourian

Name	Damage (P/V/G)	Health	Nothing	Small Energy	Big Energy	Missile	Super	Power Bomb	Notes
Sidehopper	120/60/30	1500	40	8	8	22	22	2	The Sidehopper that the Super Metroid attacks deals 80/40/20 damage and does not drop items
Metroid	12/6/3	500	4	10	20	36	20	12	Damage amounts are per 16 frames
Rinka	40/20/10	10	102	0	0	0	0	0
Space Pirate (all)	15/7/3	500	102	0	0	0	0	0

Bosses

Most bosses have the same drop table, with the exception of Crocomire and Botwoon, who notably also have a chance to drop nothing.

Name	Health	Nothing	Small Energy	Big Energy	Missile	Super	Power Bomb
Bomb Torizo	800	0	20	20	20	20	22
Botwoon	3000	2	0	52	24	12	12
Crocomire	N/A	2	0	48	40	8	4
Draygon	6000	0	20	20	20	20	22
Golden Torizo	13500	0	20	20	20	20	22
Kraid	1000	0	20	20	20	20	22
Phantoon	2500	0	20	20	20	20	22
Ridley	18000	0	20	20	20	20	22
Spore Spawn	960	0	20	20	20	20	22

Bosses (Projectiles)

Name	Health	Nothing	Small Energy	Big Energy	Missile	Super	Power Bomb
Bomb Torizo	800	21.6	46.4	8	26	0	0
Spore Spawn	960	10	4	8	80	0	0
Kraid	1000	0	4	14	80	4	0
Crocomire	N/A	2	0	48	40	8	4
Phantoon	2500	42	8	8	40	4	0
Draygon	6000	40	2	12	44	2	2
Golden Torizo	13500	24	12	12	20	34	0