Not sure how if at all the Flying Natto Monster was involved.
Sadly the Flying Natto Monster never rode Big Bang... Partly since the horse was in NAR races for most of his life unlike his sire, nor was Demuro a full-time jockey for JRA until 2015 (although that doesn't mean he didn't ride for NAR races at one point).
Fortunately (?) Tazuna-san existed in this universe, so no new Big Bang was createdThis universe's Neo Universe isn't about to lose either...!CARRIED AWAYTrainer, help me as well to make a huge [Big Bang]... together...!