Ponderosa is still alive and well. There are a few around Nova Scotia. Except the one in Truro, it burned to the ground a year or two ago, what a mess!
Atlantic Wholesalers/Superstore is trying to compete with Walmart but I doubt they will be able to, They sell clothes and furnature and stuff like walmart would have, but they just can't match the prices. Luckily they are mainly a grocery chain and Walmarts around here hasn't expanded much past the milk/eggs