hey m8 - all i've been able to get it to do so far via this is set the game to be in Bust a Move mode - but with the puzzle bobble title logo+ the BAM music+ingame gfx.
The way i set it was to set dip 1-1 w. dev set to "enable", lose a game and do not continue, press start at title and set 2-3 and remove 1-1 on the debug dip info screen then hit D. it will put u back into a round, die again and don't continue, on returning to the title screen you'll see the effect of the dip code
would be hilarious if Arkanoid is buried in there somewhere tho *Grin* It may just be an in-joke tho by Taito...
http://shinjuku.cool.ne.jp/kagami007/dm0028.JPG <- ingame debug dip menu shot.
obviously - this does mean that people with a Puzzle Bobble cart can now play BAM with the actual BAM gfx by setting the system region to USA / Arcade and debug dip 2-3 on :-) the reverse is prob true too...
there is no ending in BAM mode tho when playing on a Puzzle Bobble cart - just checked...