Hi,
You will need to buy odour remover from pet shop, since they contains enzyme to break down the odour molecues.
There are two big brands from U.S.A. : Urine Off and Simple Solution. They have the silmilar functions. Personally prefer Simple Solution, becasue you can use it with laundry and showing with dog with duiltion.
Also, you might need to consider to train your pug again for toileting.