Ngalani started learning Judo at the age of six, following his brothers. He started showing ability early, winning back-to-back junior tournaments in Cameroon and all over Africa. He was influenced by his mother, who loved the sport and wanted her boys to learn discipline and focus their energy positively. As a youth he cut down his judo training in order to study other styles such as Shotokan Karate, Savate, full-contact kickboxing, Koshiki Karate, Muay Thai and Kyokushin Karate. At elder age he also picked up other disciplines like boxing, jiu-jitsu and wrestling in preparation for fighting in MMA competitions. In addition to martial arts, he worked as a bodyguard for VIPs and high profile personalities in Côte d'Ivoire before immigrating to Hong Kong in 2001. While based in Hong Kong, he travelled to Thailand, Japan and China to win numerous titles. When the "Planet Battle" promotion was formed in 2008, Ngalani became a regular fighter for the organization. After defeating Michael McDonald at Planet Battle I in June 2008, he went on to compete in the 8-man tournament at Planet Battle II in November 2008. Ngalani, who was ordered by doctors not to fight due to a severely injured right knee, lost to Brian Douwes via knockout with a knee in the quarter-final. He then bounced back by knocking outEduardo Maiorino at Planet Battle III on June 6, 2009. At Planet Battle IV on October 7, 2009, Ngalani defeated Bob Sapp via decision, and then on March 26, 2010, he stopped Carter Williams with low kicks at Planet Battle V. Ngalani could not continue after getting knocked down with an alleged punch to the back of his head against Dževad Poturak in 2011. The match was for the IKA Super HeavyweightWorld Championship and was considered a no contest.
Move to ONE Championship
In 2013, Ngalani switched from striking to mixed martial arts, and debuted with a spinning heel kick KO win over Mahmoud Hassan at ONE: Champions and Warriors. He went without a win in his next three contests as lost to Paul Cheng, and then had a No Contest with Chi Lewis-Parry, followed by a KO loss in the rematch. Ngalani got back to winning ways a TKO win over Igor Subora, but was then stopped by Alexandre Machado at ONE: Heroes of the World. He broke promotional records for the fastest heavyweight KO when he stopped BJJ and judo black belt Hideki Sekine at ONE: Total Victory. Ngalani then met Aung La Nsang in the promotion's first-ever open-weight superfight, where he lost to a guillotine choke. He won his next bout with his first decision win over Ariunbold Tur-Ochir, and then briefly moved back in the stand-up game, where he lost to Tarik Khbabez, and then had a No Contest with Andre Meunier. Back in mixed martial arts, Ngalani was stopped by Mauro Cerilli in the first round. On April 28, 2020, news surfaced that Ngalani is scheduled to face Vitor Belfort who is making his ONE FC debut.
