As a child, Grichka impressed those around him with his exceptional talent as a dancer. Spotted by a number of choreographers and dancers, he began training in a wide range of styles at an early age, from classical ballet to African dance, hip hop and contemporary dance. At the age of eleven, he discovered urban dance with choreographers Kader Attou and Dominique Lisette. In 2005, through David LaChapelle's documentary RIZE, he discovered his favourite dance, krump, which enabled him to express his personality, his mixed-race roots and his spirituality with energy. He soon decided to go back to the roots of this movement, and in 2006 went to where it all began: the ghettos of Los Angeles. In 2008, he joined the NY Madness Fam in the United States, giving him the status of precursor and initiator of the krump movement in Europe. Grichka has taken part in numerous battles and twice won the EBS world krump championship.
Also an international krump and hip hop teacher, in 2019 he decided to delve into the world of contemporary choreography and directing, to propose a new show, Birth. In 2021, he was invited by TanzKomplizen Theater and the Offensive Association in Germany to choreograph A Human Race, a piece exploring the subject of structural racism, with Stravinsky's The Rite of Spring as the music. In 2023, he choreographed the opening ceremony of the first Cultural Talents Tournament in Saudi Arabia. He has also choreographed the last two opening ceremonies of Roland Garros alongside the conductor Zahia Ziouani and her Divertimento orchestra.