How is my Grimer immune to leech seed?

Pleaselog inorregisterto add a comment.

If your Grimer was anAlolan Grimer, which is aDarktype Pokémon, it would not be affected by status moves used by a Pokémon with the abilityPrankster.

As of Generation 7,Dark type Pokémon are immune to status moves, such as leech seed, used by a Pokémon with Prankster.Were you fighting a Cottonee? Cottonee can have Prankster as one of its abilities, and therefore aCottonee with prankster would not affect a dark type like Alolan Grimer with a status move such as leech seed

If you were not fighting a Cottonee or a Whimsicott then I do not know what was going on.

Source:https://m.bulbapedia.bulbagarden.net/wiki/Prankster_(Ability)

None of Alolan (or regular) Grimer’s abilities indicate that it’s immune to Leech Seed. As it’s not Grass type, it is affected by Leech Seed. The only ability that won’t let Leech Seed work isMagic Guard.

Therefore, if and only if your Alolan Grimer has Power of Alchemy as its ability and a Pokemon with Magic Guard in your team fainted before, it makes sense for that to happened.

If you were hit by Leech Seed, but took down the foe the same turn,then there is no foe to drain the HP to, and so your HP doesn’t go down. Simple as that.

Source: Personal experience.