His first official studio project as a solo artist was No Mercy, which was released on April 2, 1995 through White Lion Records and BM Records in Puerto Rico.
Don Omar responded to this in a song titled "Ahora Son Mejor", part of his album Los Rompediscotecas.
El Cartel: The Big Boss was released by Interscope on June 5, 2007.
where he performed a mix of three of his songs in a duet with P. The album was promoted throughout Latin America, the United States, and Europe, reaching certified gold in Japan.
Due to the album's success, Ayala received promotional contracts with radio stations and soda companies, including Pepsi.
Speaking for the artist, Ayala's lawyer stated that having his song covered was an "honor, but it must be done the right way." On April 30, 2006, Ayala was named one of the 100 most influential people by Time, which cited the 2 million copies of Barrio Fino sold, Ayala's $20 million contract with Interscope Records, and his Pepsi endorsement.
During this period, Ayala and William Omar Landrón (more commonly known by his artistic name Don Omar) were involved in a rivalry within the genre, dubbed "tiraera".
Both albums were very famous around Puerto Rico, but were not very successful around Latin America.
Between those years, Ayala released a total of nine music videos, including "Posición" featuring Alberto Stylee, "Tu Cuerpo En La Cama" featuring Nicky Jam and "Muévete Y Perrea".
He went on to emulate other artists in the genre, including DJ Playero, DJ Nelson, and DJ Drako, taking elements from their styles in order to develop an original style.
In doing so, he eventually abandoned the traditional model of rap and became one of the first artists to perform reggaeton.
It was the most highly anticipated album in the reggaeton community.