Hey!!

Im a total coding n00b! Could you please help me with creating a custom ability that when a pokemon enters the field he immidiatly leech seeds the opposing pokemon? The ability woud be called Gardner

Cheers!

This one is easy. Paste this in the new script you made for the previous ability:

BattleHandlers::AbilityOnSwitchIn.add(:GARDENER,
  proc { |ability,battler,battle|
    show_splash = true
    battler.eachOpposing { |b|
      next if b.effects[PBEffects::LeechSeed]>=0
      if show_splash
        # Show the splash only won't. 
        battle.pbShowAbilitySplash(battler)
        show_splash = false
      end 
      b.effects[PBEffects::LeechSeed] = battler.index
      battle.pbDisplay(_INTL("{1} was seeded!",b.pbThis))
    }
    battle.pbHideAbilitySplash(battler) if !show_splash
  }
)

Do you plan to make a topic for every new thing you wanna code?
I suggest you start learning some Ruby or recruit someone to make that code for you. I'm not going to write your game.