Andy is one of Jeff Bogard's adopted sons and the younger brother to Terry. When their father dies at the hands of Geese Howard, Andy decided to perfect his own martial art over at Japan to differentiate himself from his brother. During his time in Japan, Andy was taught the Shiranui-ryuu Ninjutsu and a form of empty-handed combat called Koppouken by Hanzo Shiranui.
A decade after Jeff's death, he reunites with Terry in South Town. After paying respects to Jeff's grave, they encounter Joe Higashi and learn about the King of Fighters tournament hosted by Geese. He enters with them in an attempt to avenge their father, but lost before he reached Geese. When Terry defeated Geese, Andy felt a mixed sense of closure and returned to Japan to continue his training.
After their first King of Fighters tournament, a new tournament was held, this time hosted by Wolfgang Krauser. Andy, though present in the competition, did not accomplish much story-wise. During the events of Fatal Fury 3, Andy suffered a chest wound that continued to hamper him in the Real Bout series.
Ever since Geese's death, the fall of the First Southtown, and the birth of Second Southtown, Andy has been busy training Hokutomaru through the ways of Shiranui-ryuu Ninjutsu and Koppouken. Instead of fighting in the tournament himself, he sends Hokutomaru in his place to see what his apprentice has learned. In Hokutomaru's ending, Andy writes him a note saying that he was proud to see Hokutomaru's progress. Then he ended the note by saying he is no longer his teacher but his rival and that they will cross paths again.