• 5130,5131 - Collapse
  5130 (falling to knees)
  5131 (on knees and falling to ground)
  Also called Cheese Kill (Blocking an attack and dying from the chip damage), but certain mugen characters also trigger this animation (Notable examples include BBH's Baby Bonnie Hood and Orochi Herman's Shadow DIO). There is no fixed time on either animation, nor a sprite requirement, other than previously stated.
  Examples: Guard an attack in SvC Chaos, CvS, KoF, or a few other game series, and die from chipping damage. This is also called a 'Cheap Finish' in some games.
  Special Notes:
  1) SvC Chaos characters have the fighter fall forwards, instead of backwards...but rise from the ground facting upwards. With this in mind, it'd be best to use 5950 for the Cheese Kill anim (See index number 5950) for the character. Even if you do this, anims 5130 and 5131 can still be used as special hits, granted you can supply the appropriate sprites. (CvS Pro on the PS1 may be a good source for these). Disregard this if you've added in the respective anims to take the different lie down position into account.
  
  
• 5250,5251 - Vertical spinning  
  5250 (going upwards)
  5251 (going downwards)
  When hit by certain attacks, the character flies through the air, spinning. Several mugen creations use these as special hits. If fact, 5251 can use the same sprites and amin timing as 5250, just with all the sprites flipped vertically. Very common.
  Standard setup:
  Requires collision boxes.
  (Timing is 2 ticks per frame)
   5250
  0: Facing left (opposite dirrection you'll commonly see the character face)
  1: Facing midway between left and towards the screen
  2: Facing midway between right and towards the screen (mirror of 1)
  3: Facing right (mirror of 0)
  4: Facing midway between right and away from the screen
  5: Facing midway between left and away from the screen (mirror of 4)
  Example: Saotome Cyclone from MvC
   5251
  Exactly the same and 5251, only V flag is applied to all
  
  
• 5301 - 'Birdies'
  When hit by some of Hsien-Ko's weapons and knocked out, a trio of little chibi like sprites of the character encircles himself/herself.
  Example: Some of Hsien-Ko's (aka Lei-Lei's) hits cause this to appear.
  
  
• 5330 - Super Slash Collapsing
  Found in SS (apparently...going from Roque's Nakoruru here). Very much like 5130 and 5131 rolled into one continuous animation.
  
  
• 5910,5911 - Guard Crash (Split)
  5910 (Guard has been crashed)
  5911 (recovering)
  If a character blocks too many attacks in a short period of time, the will be guard crashed, during which they'll stop blocking and be stunned, and very open to attack. Actually used more for special hits, the last anim sprite of the guard crash itself (before the recovery phase) has a time of -1. These two are really used primarily in special hits.
  Example: CvS, SvC, other games.
  
  
• 5912 - Guard Crash
  5910 and 5911 in one continuous animation...for all intents and purposes, this is more than likely the anim you'll use for the character's guard crushing, setting up 5910 and 5911 for special hits.
  Example: CvS, SvC, other games.
  
  
• 5915 - Guard Crash
  Just an alternate for 5912
  
  
• 5920 - Guard Crash - Crouching
  Same purpose as 5912/5915, but specifically for when crouching. Also used after the character has been guard crashed in the air and lands.
  
  
• 5930 - Guard Crash - Air
  Same purpose as 5912/5915, but specifically for when in the air.
  
  
• 5940 - Tech Hit
  Tech hitting out of throws, basically. The character preforms a move to push away the opponent, and break out of a throw. No set length to time or sprite requirements.
  Example: SF III
  
  
• 5945 - Throw has been Teched out of
  Opponent Tech Hits out of the character's throw attempt. Character  is pushed back a little, and slightly open for attack from the opponent. No set length to time or sprite requirements.
  Example: SF III?
  
  
• 5950 - Collapse
  Basically the same anim as the other collapse anim, only with 5130 and 5131 combined. Used by some japanese creators, and useful if the Cheese Kill/Collapse anim has the character falling forward when they usually fall backwards on dying, so as to avoid complications with most chars that use an in-fight collapse anim special hit.
  
  
• 5960 - Red Arremer Transformation
  After losing to Red Aremmer, the character is transformed into a monster of sorts (usually). No set timing or sprite requirements.
  Example: SvC Chaos secret boss
  
  
• 5965 - Athena Transformation
  After losing to (SvC) Athena, the character is transformed into an animal of sorts (usually). No set timing or sprite requirements.
  Example: SvC Chaos secret boss
  
  
• 7008 - Spinning Horizontally Upwards
  The character is throwing horizontally into the air, spinning as they do so. The animation is set up as follows:
  0: Facing straight flat-out to the right. (90 degree angle if you reffer to straight facing up as 0 degrees, and go clockwise)
  1: Facing 135 degrees
  2: Facing 315 degrees
  
  The center should be about center for the sprite itself, so that it appears to spin fluidly.
  
  The AIR entry is also as follows:
  7008, 0, 0, 0, 2
  Loopstart
  7008, 1, 0, 0, 3
  7008, 1, 0, 0, 3, H
  7008, 0, 0, 0, 3, H
  7008, 2, 0, 0, 3
  7008, 2, 0, 0, 3, H
  7008, 0, 0, 0, 3
  Examples: Anakaris' Gate to Hell attack.
  
  
• 7694 - Seppuku  
  The art of japanese ritualistic suicide with a sword, katana, or other weapon. Bishamon has an attack in NW and VS that will force the player to pull out a sword, then impale themselves with it. Found in BBH's Jedah and Baby Bonnie Hood. Overall time of anim cannot exceed 109 ticks.
  Examples: Bishamon's Hane Ha attack.
  
  
• 7695 - Massive Bee Stings  
  The aftermath of being swarmed and stung by bees or other such similar insects. Q-Bee has an attack that causes this effect. Found in BBH's Jedah and Baby Bonie Hood, as well Hsieh's Morrigan. Usually one frame.
  Example: Q-Bee's +B attack
  

Actually, you're wrong amigo: all the creators that do use this as a standard use 9010,10 for the second sprite...this includes H and Mouser.

Quote

Exactly the same as 7696, but with one major difference: the first sprite must be numbered 9010,0, and the second 9010,1...this is because they're commonly used with ChangeAnim2. Also, you should have a duplicate of 9010 in your SFF as 9010,10, for the ChangeAnim2 reason.

Think that'll cover both bases?

Weapon:
8055054 - Unarmed
8055055 - Bladed
8055056 - Piercing
8055057 - Blunt
8055058 - Magic
8055059 - Projectile (guns, etc)

Ya know, I just noticed, too many of those numbers are consecutive between categories.  I think it'd be better to break them up, like 805500# for gender, 805501# for age, 805502# and 805503# for type, and so on, with no two categories using numbers identical except for the ones place, and with no categories having consecutive tens places if the first category is anywhere near full (or potentially could become significantly more thorough in the future).

@Messatsu: I changed up the Armor, Blocking with, and Weapon types just a little by adding in a few entries.