[1] He competed at the 1988 Summer Olympics in Seoul, South Korea in the Light Flyweight (-48 kg) division, winning the bronze medal in a lost bout against Ivailo Marinov from Bulgaria in the semifinals.

He is noted for having been the only gold medalist for the Philippines in the 1985 Southeast Asian Games in Bangkok, defeating Thai boxer Supad Boonrowd in the men's 48kg final.

In January 2021, he was reportedly placed under intensive care at the Philippine Veterans Hospital due to a serious pulmonary and heart condition.

[7] Bounty Agro Ventures committed to give Serantes a monthly allowance of ₱100,000 for life to help pay his medical bills and needs.

[8] Serantes died on September 1, 2021, at the age of 59 due to complications of chronic obstructive pulmonary disease.