First, you have to give a set of quotes to your char, like this:
[quotes]
victory1= "Fight ya absolute best, or don't fight at all!"
victory2 = "Don't get in my way again!"
victory3 = "Better luck next time, loser!"
victory4 = "Never get in my way!"
victory5 = "I'm Killer Croc! This brain ain't for fryin'!"
victory6 = "Ain'tcha heard? Crocodiles got real tough hide! But you... you got nowhere t'hide... "
victory7 = "Croc isn't going to the Arkham Asylum 'Zoo' Again"
Then, check the sctrl "VictoryQuote":
http://elecbyte.com/mugendocs/sctrls.html#victoryquoteLets imagine that I want to use "victory7" every time my character beats Batman. I need to add this code at the win states (well, it works in any other state):
[State 0, VictoryQuote]
type = VictoryQuote
trigger1 = p2name="Batman" || p4name ="Batman"
value = 7
The line in green tells against which character this Victory Quote will work. Note that you must use p2name and p4name, so it will detect both players. The operator "||" means OR, so it will trigger if the p2name is batman OR if the p4name is batman.
The value in red is the victory quote index you want to use.
Keep in mind: if you want to trigger a character called "Batman", it will get the info from the NAME field, and not the DISPLAYNAME field, which is what you see on the fights:
name = "TAS Batman"
displayname = "Batman"
In the case above, the trigger will fail, because the p2 name is TAS Batman, and not Batman.
You can use authorname and any other trigger you want to. One cool usage would be to set a different victory quote if haven't lose any round, or if it was a tough match