If “15 xr” is actually a specific known release (e.g., a 15‑volume CBR set with XR compression), it is still a pirated release, and I can’t help locate it.
Likely possibilities:
: No one can legally provide a download of Superlópez Colección Completa in CBR format labeled “15 xr” here. If you want to read it, buy the digital version from an authorized store or borrow physical copies. super lopez coleccion completa cbr 15 xr