Probably none. Some of their attacks are kind of scary. I can't post the picture because it would violate the "violence" section of the forum rules, but I got my lip bit literally in half, a full 1" from the lower part of my nose down to the bottom, of my top lip by an extremely violent Doberman Pinscher biting me a year ago this month. I required 100 stitches from a plastic surgeon. It was a very gory, very bloody picture I took of me in a hospital ER bed while laying down waiting for the Plastic Surgeon to show up that day as my face had been mutilated by a dog.
I imagine this attack would be similar to a Growlith's Bite attack.
Some of the attacks the Poke'mon do, if they ever used them on their human trainers, such as Pikachu often shocking Ash in the Anime, would NOT be a fun experience. I imagine it would be similar to when a cop uses his taser on you.
Take Arbok, obviously inspired by a King Cobra. In the game it bites you and you're "poisoned" (ironically though, no snakes are poisonous, a lot of snakes however are 'venomous'). If that happened in real life, well it was nice knowing you, but thats the end of you. And for that matter, short of a Honey Badger Poke'mon, the end of your Poke'mon after the battle as well.
I'm in Tucson Arizona, we have a good amount of rattlesnakes per acre in any given part of the desert. one bites you, and IF you make it to a hospital in time, assuming you're not a small child or an elderly person, you're out of commission for a couple weeks, while using up $2,000 per vial anti-venom.
When I was at my work at a college, they had a copperhead in a glass cage, and I poked my face in front of his cage and he lunged and bit the glass. If he had been successful, that would have been a long stay at the hospital for the next several days or weeks. On the opposite end of the spectrum they had a Timber Rattler which was extremely mellow and never coiled up or prepared to bite you if you did anything in front of his cage. The only way I could foresee him biting you and envenoming you is if you stepped on him (which is possible since they have amazing camouflage on their scales that makes them as close to invisible as Predator in that Arnold Schwarzenegger movie from the 80's without actually being invisible)
We got Bark Scorpions that require a trip to the hospital and takes multiple days to recover from their stings. Your whole leg can get paralyzed for a period of time just over a small scorpion stinging you on your foot and numbing your nerve endings as its the most dangerous scorpion on the N. American continent. I check my covers in bed every so often for bugs, since bugs and the desert go hand in hand, but usually all I find are some ginormous and disgusting cockroaches. That being said we have had Scorpions in our house before and we do everything in our power to maintain a relatively bug free house (when I say bug, that includes Arthropods and Arachnids like Scorpions).
Some of the Poke'mon's attacks are obviously inspired by their interpretations of their real life counterparts, and while I can tolerate some animals, I own a hamster afterall (very similar to a Rattata minus the tail) I don't think we need, you know 719 more species of animals on this planet all capable of doing attacks against potential human targets. I try to avoid the venemous bugs and snakes in my part of the desert as it sits now. IIRC Ash died for a period of time from getting hit by an attack from MewTwo in the original movie.