I think they just copy the players, like my Wolf is starting to play more like me than it used to, it's even trying to cancel the Fairs (And failing miserably) But yeah, I think it just takes what the player does in certain situations and replaces its other response with the response the player did.
i noticed that stuff your friends do as certain characters or you do as certain characters that are effective they computer will start doin that stuff especially against the character it was working on...
... these are the things my cpus do now:
ike does the edge dtilt spike all the time
pit edgeguards with forward b
snake edgegaurds with missile drops
mario cape flips everyone who recovers
pit mirror shields recoverers
dk does the suicide grab spike -ALOT-
captain falcon does the suicide falcon punch -->
http://www.youtube.com/watch?v=rItrXj1lEGc
weegee does the death shoryuken when anyone gets to 45 percent
GANONDORF does the suicide falcon punch
jigglyuff does the alternative rest combo
all the starfox character cancel forward b
fox hover shield edgegaurds and pivot grabs
snake does the slideing up a smash
falco does the dash kick up a smash
mario does the super cape dash
http://www.youtube.com/watch?v=gd-afoFbJ7c
marth counters in a ridiculous quantity
marth zero percent spikes -ALOT-
my cpu ganondorf never misses spikes bcuz of my ganondorf T_T
so yea ima try and see if theyll adapt to wave dash in brawl+ and then laff wen dey suck in regular brawl XDDD