He had a big reputation in Cuba and also in Argentina in the 1920s. I don't know Spanish so haven't really researched him in depth.
https://www.ecured.cu/Kid_Charol http://theboxingglove.blogspot.com/2017/10/on-this-day-kid-charol-remembered.html?m=1 http://oudesite.samsam.net/opa-waarom-noemen-ze-u-kid-charol/ Translate the first and last. Google will give you the option. EDIT: ignore the last one.