Take a look at the Siglerpedia page for Pookie and you will see that within the Nocturnal storyline, it's mentioned that Pookie hailed from Chicago, IL but moved to San Fran, CA, therefore the accent is appropriate. 

Also, I may be reading into your statement a bit more than I should but you seem to insinuate that since Pookie is Asian there should be some specific accent that should be attached to him...hate to break it to ya buddy but there are a ton of Asian Americans whose accents represent the region of American they grew up in.  Just sayin'...

at one point it is mentioned that bryan can stand pookie cause he is fro Chicago

By the way,

Check him out here.

..No Bounce..

...No Play...

didn't it say that pookie moved from chicago? i swore i heard that in the earlier episodes 

gothguy720.deviantart.com

i guess i missed in the story that he's from chicago. and i meant nothin by the asian thing.

and i understand that makin all these different voices takes much talent.

i bow to you FDO.

please, spare my life after the takeover. 

*can't wait till episode 723 when nocturnal finally ends!