Poison Type Attacks vs Grass

[Tomorrow]

So I'm in Darchlight Forest and I need to grind so I can beat Florin. I have my Muk fight a Shiinotic (Grass/Fairy) and I use Poison Jab and Gunk Shot. Both do not very effective damage instead of Super Effective. I have the most patch 10 installed in my game. Is there something wrong with the poison typing or what?

[Zargerth]

I guess the field effect in play is the reason. I was caught off-guard as well.

[Tomorrow]

but if the field effect did do something to reduce the damage, the text box would say something and it would still display super effective. Just like if you use a fire type attack in a water field

[FairFamily]

It changes type effictiveness in this case.

[Tomorrow]

can you link me the field effect description? I need to fight the next gym leader (grass) in this forest and I want to see what it affects

[FairFamily]

Well they can be found in your rejuvenation folder.

 

"Everlasting glow and glamour!"

*    Sleeping in the fairy rings is dangerous. Pokemon will take fixed
    damage per turn while asleep. (TotalHp/6)
*    Fairy type moves increase in base power by x1.5.
*    Grass type moves increase in base power by x1.5.
        Grounded Grass Pokemon restore 1/16th Max HP each turn 
*    Fairy and Grass types now hit Steel type Pokemon for Super Effective damage.
    Poison attacks deal neutral to Grass and Fairy types.
*    Dark type moves increase in base power by x1.2.
*    The following moves gain a 1.4x boost in power:
        Ice Beam, Hyper Beam, Signal Beam
        Aurora Beam, Bubblebeam, Charge Beam
        Ice Beam, Psybeam, Flash Cannon.
*    The following moves gain a 1.2x boost in power:
        Dark Pulse, MoonBlast.
*    The following moves accuracy has been increased to 95:
        Poison Powder, Sleep Powder, Grasswhistle, Stun Spore.
    Nature Power becomes Dazzling Gleam.
    Secret Power may randomly inflict Sleep, Poison, or paralysis.