Board Thread:Plants vs. Zombies 2: It's About Time/@comment-25200219-20141010042918/@comment-24735666-20141014124728

Xenons wrote: I don't know if this has been said before, but the reason why there's no Brainiac Maniac theme in BWB may be because of a glitch.

In the files, it is supposed to play on SOS level and Bulb Bowling, but it is replaced by UB. So they're probably fix it :)