Serasinghe who was teamed-up with Matthew Chau beat their compatriot Robin Middleton and Ross Smith in the final with the score 21–17, 23–21.
Mapasa claimed the women's doubles title after beat Renuga Veeran and Leanne Choo with the score 21–14, 22–20.
In the mixed doubles event Mapasa and Serasinghe again became the champion defeat Chau and Choo 21–19, 21–18.
The women's singles final also present the Australian players, and Wendy Chen claimed the title after beat Louisa Ma 21–7, 21–14.
Abhinav Manota of New Zealand broke the Australian stranglehold on the Oceania championships by winning the men's singles gold medal.