The 60-year-old petro-chemical company employee sported a traditional Thai scarlet outfit in Jakarta, where he devoted most of his boundless energy to the weight-lifting and boxing.
"I came to cheer for many sports that I could get the tickets to get into. If some sports play at the same time, I couldn't cheer for them so I send my regards," said Weerawong, showing off his flag-painted cheeks.
Weerawong, who has been to 10 Southeast Asian Games, six Asian Games and three Olympics, has spent close to a hundred thousand dollars touring the world.
But the Thai sports authorities now pay for his accommodation, saying it helps the nation's athletes, and he gets help from his company for the travel costs.
"After they saw the significance of what we do they helped out because it's difficult for transportation, accommodation and budget," said Weerawong, who designs his costumes to resemble traditional attire from north-east Thailand.
Weerawong said his passion for sport was sparked as a young man when he was a keen runner, although these days he prefers bowling.
"I loved sports since I was young. I was an athlete, a runner but I was not that good," he said.