[2] He began his musical career in 1997 with a song entitled "Como puedo cantar" in a duet with Toby King, which belonged to Pucho Bustamente's Da Crew album.

Being at that time where he recorded the song "Déjala" with Duende which managed to be placed in the rankings of countries such as: United States, Guatemala, Nicaragua, Venezuela and Peru.

"[4] In 2007 he released his first solo album called Te Quiero: Romantic Style in da World which received a review of two and a half stars out of a total of five by the Allmusic web portal.

[8][9] With all this achieved, the Panamanian performed duets with Juan Luis Guerra, Daddy Yankee, Wisin & Yandel, Sean Kingston and Rihanna.

[12] In that same year he had a brief foray into acting by having a special participation in the television series Central de abastos and the song "Te Quiero" served as the soundtrack.

[14] During that year he won 8 of 13 nominations at the Billboard Music Awards, surpassing great artists such as Enrique Iglesias, Maná and Luis Fonsi.

In that year he collaborated with the Puerto Rican duo Alexis & Fido on the single "Contéstame el teléfono" which was nominated for the Lo Nuestro Awards in the category of Best Urban Song, although it would not ultimately win.

In 2018, he made his musical return to Mexico after being blocked by his old discography, premiering the single "Cerquita de mi" with Mexican singer Ricky Rick.

[21] The artistic name that Félix initially adopted sparked controversy and was harshly criticized in the United States, as "Nigga" is an adjective that can be used pejoratively and derogatorily in another form.

[2] On March 10, 2021, there was an altercation with the Puerto Rican rapper Darell, who released a video on his social networks asking the Panamanian producer El Chombo to revive Flex, who was well dead in the music scene.