Believe it or not, slurpuff are primarily dog-like pokémon. As such, they require many of the same things your average snubbull or furfrou may need: a meat-based diet (or kibble), dog toys, frequent walks, a soft bed, regular tooth-brushing and baths, and so forth.
The difference is in its fur and nose.
First and foremost, you’ll notice that your slurpuff is constantly sticky, even slightly so on good days. This is perfectly normal and a by-product of the unique sweat and curly fur coat of the swirlix line. However, this also means that you’ll need to maintain it regularly by not only brushing out loose hairs and dirt but also, perhaps, by giving it a bath. Baths are not necessary (or recommended) on a daily basis, but it’s always a good idea to give your slurpuff one ever few days—and either way, daily brushing is essential to remove debris. Additionally, an important note: if anything larger than a tennis ball ends up stuck to your slurpuff, try not to pull it out, as this will hurt your pokémon. Rather, carefully clip the object out with a sharp pair of scissors.
Furthermore, be sure to take your slurpuff to a professional groomer—or groom it yourself, if you have the confidence—at least once every few months to keep its coat pared down. Otherwise, your slurpuff’s sticky hair may grow long and inhibit both movement and comfort.
As for its nose, it’s important to keep in mind that slurpuff’s sense of smell is among the strongest in the pokémon kingdom. It’s therefore important to keep a clean house and to remove any sources of bad odors to avoid confusing or irritating your slurpuff. You may also consider lessening your use of perfume or cologne, although some slurpuff actually enjoy those scents. (It may be worth asking your slurpuff.)
Best of luck, anonymous!