Ranking Pokémon by how good they'd be as real-life pets!

I randomly got this idea, so I'm posting about it.
Pokémon will be ranked based on their Pokédex entries with one of the following letters:
S - Amazing pet, downsides are minimal.
A - Great pet, if you do everything right. If not, there may be complications.
B - Good pet, but may have complications even if you do everything right.
C - Decent pet, but the downsides may be too much for most people.
D - Not very good pet, for any of several reasons.
F - Terrible pet, probably hates you.
Note: if I say probably, that's something I'm getting from just the feel of the Pokémon, not the Pokédex.
Note 2: Some Pokémon may have lacking descriptions. When this happens, it's because most of the Pokédex entries effectively say the same thing.

Let's get into it!

Wigglytuff: S
Fluffy, and amazing to cuddle. Is probably also very friendly. If you make it angry, it will body slam you. However, that's probably not too bad considering it's only 12 kilograms (26.5 pounds).

Alolan Meowth: B
It's selfish, picky, and prideful. If its coin gets dirty, it flies into a rage. Besides this, it's pretty much just a cat.

Parasect: D
Fortunately, you probably won't have to do much for it. Unfortunately, it scatters poisonous spores. Additionally, though this is just my preference, I wouldn't really want a mushroom-controlled zombie as a pet.

Growlithe: S
It will proudly protect its Trainer no matter what. Its loyal and always obeys commands. If it knows you're safe, it won't have an issue with you. It can also use its sense of smell to determine peoples' emotions, so it can be there when you're feeling down.

Jolteon: C
It easily becomes sad or angry, it's difficult to become friends with, and lightning sometimes strikes near it. Its fur is bristly, and filled with static electricity. Would probably be a good friend if you can grow close to it, though.

Chatot: A
You can teach it to speak, and so you can communicate with it better than with most Pokémon. However, if you don't watch your language near it, it might swear in public. Not the worst thing ever, but maybe something to avoid.

Hydreigon: F
If left unattended, it will probably destroy your entire neighborhood. Maybe even if left attended.

Don't be afraid to give me ideas so I can make a part 2!