This period marks the group’s peak creative and commercial success, defined by the songwriting of Juan Antonio Jiménez (Jero).

A "MEGA exclusive" collection typically spans decades of hits. If you are looking to complete your digital library, these are the cornerstone albums you cannot miss: 1. Ni Más Ni Menos (1974)

Assuming "Mega Exclusivo" is the album, but given the user's instruction, it's possible they're using it as a hyperbolic term for the comprehensive nature of the discography. So the paper would present the complete works of Los Chichos as a "mega exclusive" collection, emphasizing its uniqueness and value.