They were the first to introduce the Koyimbi-Ko dance (from 6:02). Luckily that Werrason adopted that dance like he did with Helicopter and years later Malewa, otherwise it would have gone unnoticed like many good Brazza-dances.
The way they danced it is different. It looks like being a mix of Victoria Eleison's dance Tchalufu with Koyimbi-Ko. Back then King Kester Emeneya came mad on tv, saying that he came with a new dance Tchaufu to counter Koyimbi-Ko, claiming that Werrason introduced Koyimbi-Ko to finish his dance Kiwanzenza (I miss Kester, he was so funny).
I wonder if JB Mpiana would not adopt Koyimbi-Ko, if he didn't went to Bercy back in 2001. Because before Bercy they introduced the "Muana Mobali Asuanaka te-dance", which was also to like to counter Koyimbi-Ko and who came in the same period. But when coming back from Europe and having performed at Stade des Martyrs, he ended up by adopting Koyimbi-Ko in the "JB Mpiana abuki Stade des Martyrs-cri".