I already have this feeling that my request isn't going to be a good result, but I'd like to hear about Bouffalant.
If you’ve visited some of the National Parks in the United States (or are a wildlife fan who has been on the internet enough), you may have seen just how many signs there are warning people not to approach bison, despite how cute and soft they look. They can really, really mess you up. Bouffalants, unfortunately, can also really, really mess you up. Considering their large size and formidable power, I really can’t recommend a Bouffalant to anyone looking for a nice, Normal-Type house pet.
At over five feet tall with plenty of wooly bulk and long, horizontal horns to boot, I’d wager that it would be a little difficult to fit a fully grown bouffalant in your home. Getting through doorways would be hard enough already! Thankfully, they aren’t as heavy as you might assume at just over two hundred pounds, but they’re certainly not the kind of pokémon that you could easily carry around. A bouffalant would have to be an outdoor pet for sure, which is certainly not a dealbreaker for every owner. That, however, is where their behavior comes in.
See, bouffalants are known to charge wildly and unpredictably, and they are highly territorial (White, Black2/White2). Bouffalants are not afraid to ram anything that comes their way, due to the fact that their fur absorbs force, protecting their bodies from blunt force harm (Black, Y, Alpha Sapphire). These iconic headbutts, according to the pokédex, are powerful enough to fully derail a train or crush a car in one hit (White, Black2/White2, X, Omega Ruby, Sword). This could, obviously, prove pretty lethal to a human. While physical moves like Tackle, Horn Attack, Head Charge, and Giga Impact are essentially the extent of a bouffalant’s ability, each of these moves having enough power to knock down a house is a pretty huge concern.
Bouffalants are social creatures, which is usually a plus, but in this case it could cause even more headaches. Bouffalants live in herds of about 20, within which they are loyal and protective (Shield). This is sweet, but caring for not just one train-derailer, but twenty. As you can tell, caring for bouffalants is starting to look like a job for a rancher or a conservationist, not the average pet owner. Costs of care are going to be really high when you consider feeding and housing a whole herd, let alone managing them.
These powerful, majestic pokémon, just like bison, are best left on their own in the wild or under that care of a professional, so I cannot recommend them as a pet to almost any potential owner.