I noticed that there isn't any AI coding tutorial here except for Winane's AI method but it does not show how to code moves for the cpu to use, So i thought to give it a shot, I'll be explaining the "Cpu only commands" activation method not Winane's method, It takes just few seconds to kick in, I know that Winane's method is better but Cpu only commands is easier to learn and much more simple.
Before i proceed, I feel obligated to say that if it wasn't for Liger i wouldn't type this tutorial, He tought me every thing i know, Ok now lets begin...
First off, Open the CMD file of the character and add lines like these to declare the AI only commands and above any thing else in the CMD file:
;-| AI |------------------------------------------------------
[Command]
name = "CPU1" <------------------------(AI Command Name)
command = U, D, F, U, D, F <------------(Command combination)
time = 0
[Command]
name = "CPU2"
command = U, B, F, U, D, F
time = 0
[Command]
name = "CPU3"
command = U, D, D, U, D, F
time = 0
[Command]
name = "CPU4"
command = U, F, U, B, U, D, F
time = 0
[Command]
name = "CPU5"
command = B, B, B, U, B, U, D, F
time = 0
[Command]
name = "CPU6"
command = U, D, B, U, B, U, D, F
time = 0
[Command]
name = "CPU7"
command = F, F, B, U, B, U, D, F
time = 0
[Command]
name = "CPU8"
command = U, D, U, U, B, U, D, F
time = 0
[Command]
name = "CPU9"
command = F, B, B, U, B, U, D, F
time = 0
[Command]
name = "CPU10"
command = F, F, B, B, U, B, U, D, F
time = 0
You can add as much more as you like but don't exceed 60 cause the CMD only supports 128 unique commands per character including human commands, And you will not need that much any way, I only use 40 or even less, Also don't use same command combination, Each cpu command must have a unique combination and it doesn't matter what the combination is as you see above it's just some random combinations.
It's time to announce to the CPU that it has control over the character, You can add the activation code in the CMD file under [Statedef -1] preferbly at the end of the CMD, Or you can program the AI in one of the CNS files of the character under [Statedef -2] or under [Statedef -3] but those statedefs must be declared, in some characters -2 or -3 are not declared so you have to declare them yourself by typing [Statedef -2] or [Statedef -3] and then add the activation code under them, in the CMD [Statedef -1] is always declared by the creator so no need to declare it again but if you separate the AI from the character files in a separate file, You're gonna have to declare it again.
Activation Code:
; AI switch -> ON
[State -1, Activate AI]
type = Varset
triggerall = var(59) != 1
trigger1 = command = "CPU1"
trigger2 = command = "CPU2"
trigger3 = command = "CPU3"
trigger4 = command = "CPU4"
trigger5 = command = "CPU5"
trigger6 = command = "CPU6"
trigger7 = command = "CPU7"
trigger8 = command = "CPU8"
trigger9 = command = "CPU9"
trigger10 = command = "CPU10"
v = 59
value = 1
This is a variable set telling the computer that when Var(59) is = 1 then do this and do that, But you must make sure that the variable 59 is available and not used in any thing else in the character coding or else use another variable, Also you must copy and past this line "triggerall = var(59) != 1"in each and every human command in the CMD file to differ between the commands you use to play with the character and the commands the CPU use against you, You'll find in the character CMD file human only commands look like this:
[State -1,FLK]
type = ChangeState
value = 310
triggerall = command != "holddown"
triggerall = statetype = S && ctrl
trigger1 = command = "a" && command = "holdfwd"
trigger2 = command = "a" && command = "holdback"
Add the AI cancelation code to it like this:
[State -1,FLK]
type = ChangeState
value = 310
triggerall = var(59) != 1 <---------------- This cancels the AI usage of the human commands
triggerall = command != "holddown"
triggerall = statetype = S && ctrl
trigger1 = command = "a" && command = "holdfwd"
trigger2 = command = "a" && command = "holdback"
It's a lot of copy and paste but that way you'll cancel any interferance from the default Mugen AI, Now the character is like a blank page for you to write what you see fit, But before we venture into AI programing, Open the CNS file and in the [Data] paragraph change the number of the IntPersistIndex to = 58, if it's already = 58 then keep it and if this line is not typed, Type it yourself "IntPersistIndex = 58" don't ask why cause i realy don't know, it just activates the AI faster i think.
Edit: This means if you activated the AI in round one, it'll still be active in round 2+. (Thanks Cyanide)
Edit: Please note that the programing of the AI itself i'm about to explain doesn't matter if you use this activation method or Winane's method, It's the way AI is programed in both.
Now you start programing the AI, Each cpu command must have [state -1] declaration or -2 or -3 depending on the state you're programming the AI in, For example:
[State -1, AI] ; punch
type = ChangeState
value = 200 <----------------------- State no. of the animation you want the CPU to perform
triggerall = roundstate = 2 <--------- Trigger during the fighting phase of the round "Round One...Fight"
triggerall = var(59) = 1 <------------ AI variable that must be used in every CPU command
trigger1 = ctrl = 1 <----------------- Character can be controled (Not performing a move)
Now you told the CPU that when Var(59) equals 1 and you have control over the character then perform a change state, In this case the state wanted is a weak punch(value = 200), There are 2 ways to know the state no. of the character moves while coding the AI, First one is choosing the character in training mode and turn on debug mode by pressing ctrl+D, Performing every move and the debug mode will tell you the state no. of the moves, The second way is the easiest just open the character in fighter factory and press the animation tab, you'll find the begin action no. bar displays every move state no.
But the code above is very basic and will make the character keep punching continuasly like an idiot, So you must add more triggers to make the character punch only in a certain situation like this:
[State -1, AI] ; punch
type = ChangeState
value = 200 <----------------------- State no. of the animation you want the CPU to perform
triggerall = roundstate = 2 <--------- Trigger during the fighting phase of the round "Round One...Fight"
triggerall = var(59) = 1 <------------ AI variable that must be used in every CPU command
triggerall = statetype != A <--------- Trigger when the char is not in air
triggerall = random < 500 <---------- Trigger the move in 50% of the times the conditions is met (i'll explain more)
triggerall = p2statetype != L <------- Trigger when opponent is not lying on the floor
triggerall = p2bodydist x = [0,40] <--- Trigger when the opponent is between 0 to 40 pixels away horizontaly
triggerall = p2statetype != A <------- Trigger when the opponent is not in air
trigger1 = ctrl = 1 <----------------- Character can be controled (Not performing a move)
Now you told the CPU that when Var(59) is equal 1, The char is not jumping, Opponent is not jumping, Opponent is close, Opponent is not lying down and char is controlable then perform a weak punch, Now the code is much smarter.
The differance between triggerall and trigger1 is:
Triggerall is a condition that must be met for the whole changestate to be performed but trigger1 is a condition that triggers one part of the changestate, You can have trigger2, trigger3 or more like this:
[State -1, AI] ; punch
type = ChangeState
value = 200 <----------------------- State no. of the animation you want the CPU to perform
triggerall = roundstate = 2 <--------- Trigger during the fighting phase of the round "Round One...Fight"
triggerall = var(59) = 1 <--------------- AI variable that must be used in every CPU command
triggerall = statetype != A <------------ Trigger when the char is not in air
triggerall = random < 500 <------------- Trigger the move in 50% of the times the conditions is met (i'll explain more)
trigger1 = p2statetype != L <----------- Trigger when opponent is not lying on the floor
trigger1 = p2bodydist x = [0,40] <------- Trigger when the opponent is between 0 to 40 pixels away horizontaly
trigger1 = p2statetype != A <----------- Trigger when the opponent is not in air
trigger1 = ctrl = 1 <-------------------- Character can be controled (Not performing a move)
trigger2 = stateno = 210 && movehit<--- Trigger it in a combo when in stateno. 210 and the move hit the opponent
trigger3 = stateno = 400 && animtime = 0<--chain it to stateno. 400 and the animation is over
You can see that trigger1 is a different condition than trigger2 and trigger3, Three different conditions that the changestate can be performed in but all must meet the triggerall condition to be performed.
Now how to chain moves to each other, as you can see in the code above there is "trigger2 = stateno = 210 && movehit" means that trigger the weak punch after the low punch (210) is performed and did hit the opponent, There is also "movecontact" meaning that the move made contact whether it's a hit or got blocked.
Ok it's past midnight here and i have to sleep to go to work cause i look like this 
so i'll continue tommorow and add a list of triggers and thier discreption to complete the tutorial and start answering your questions and/or curses.
