>>44040860>Knock Off fucks up everything defensiveLosing Leftovers on Toxapex Clefable Corviknight is a lot different from losing Boots on your Rocks and Spikes and U-turn weak Parasect.
>LandorusYou're calcing against unboosted itemless Landorus, you can say "oh but you don't get 2-shot by Scarf" but Scarf is just going to nail you with U-turns anyways so that's not a good matchup. Funnily enough, normal Hippowdon ends up being the better switch-in to that set (especially since it can afford Helmet). SD makes the weakness an issue because now you're taking 72% minimum, support sets can freely Knock Off or U-turn, like where are you getting value out of Parasect over another Grass or Hippowdon?
>other GroundsThe Exca matchup is the only significant one for Parasect, and even that's a bit sketchy because of flinching, sand damage, and powder move accuracy. Hippowdon is trivial to switch into, Krookodile knocks your Boots off, and Diggersby gets Fire Punch.
>and heal off the damage with SynthesisThis is another thing, Synthesis sucks and most mons avoid it if they have any other option. Compare 8 PP of conditional healing to infinite Regenerator heals or 16 Slack Off PP.
>You are underestimating Hippowdon's bulkHippowdon's bulk is great, the question is why you'd use a retype with far more weaknesses when you can just use Hippowdon itself or Tangrowth instead.