Can someone tell me where to find bass Sp? (in MMBN2) I really want to battle him.

Next time you have a question posrt in the help topic. But, as for your question...
His name isn\'t Bass SP, its Bass Delux.
To fight him you must have all the chips except the following, Life Aura 3, Bass V2, and Bass V3, now once you get all the chips go to WWW 3, it\'s a random encounter, so bring a few Locenemys and Fullenergy in case you don\'t get his chip the first time, it takes awhile so you\'ll need to be patient.