Help making custom moves

[Telemetius]

Hello forum, I recently saw a series of questions asking for help to make (or to make public) new custom moves and I was thinking, does it deserve its own thread?

Anyways, what I'm trying to script is:

1) IRON WILL
-for 5 turns the user defense and sp def will be raised by +1 each turn
-the atk and sp atk will be lowered by -0,5 each turn

-works only if the pokemon is slower than the adversary
-works only if the pokemon has more than 50% of its health left
-works only on iron types
-after 5 turns def and sp def will be lowered by -5 while atk and sp atk will be raised by +2,5

##########################################

2) ROCKFALL
-it will cure the user with 60% of its total health
-it has +1 priority
-it will distract the adversary

-cannot be used twice in a row
-it will lower the user speed by -5
-works only on rock types

##########################################

3) FREEZE STING
- with a 100% accuracy it will freeze the target

- cannot be used on ice types
- cannot be used on fire types
- cannot be used twice in a row

##########################################

I understand that No 2 and 3 are broken but they are supposed to be annoying and they'll be used just once.

This is my attempt for Freezesting, it's working:

################################################################################
# Custom Move BRINAMENTO
################################################################################

class PokeBattle_Move_15A < PokeBattle_Move
  def pbEffect(attacker,opponent,hitnum=0,alltargets=nil,showanimation=true)
    if @congelato==true
       @battle.pbDisplay(_INTL("Too tired to use Brinamento!"))
       return -1
    end
    return super(attacker,opponent,hitnum,alltargets,showanimation) if pbIsDamaging?
    return -1 if !opponent.pbCanFreeze?(attacker,true,self)
    pbShowAnimation(@id,attacker,opponent,hitnum,alltargets,showanimation)
    opponent.pbFreeze if opponent.pbCanFreeze?(attacker,false,self)
    return 0
  end

def pbAdditionalEffect(attacker,opponent)
  if opponent.pbCanFreeze?(attacker,false,self) && opponent.pbHasType?(:ICE)
       @battle.pbDisplay(_INTL("Brinamento has no effect on Ice Pokémons!"))
       return false
  elsif opponent.pbCanFreeze?(attacker,false,self) && opponent.pbHasType?(:FIRE)
       @battle.pbDisplay(_INTL("Brinamento has no effect on Fire Pokémons!"))
       return false
  else
    opponent.pbFreeze if opponent.pbCanFreeze?(attacker,false,self)
    @congelato=true
    return true
  end
    return false
 end
end

This is rockfall:

################################################################################
# CUSTOM MOVE SEDIMENTAZIONE
################################################################################
class PokeBattle_Move_15B < PokeBattle_Move
  def isHealingMove?
    return true
  end

  def pbEffect(attacker,opponent,hitnum=0,alltargets=nil,showanimation=true)
    if @tentenna==true
       @battle.pbDisplay(_INTL("Too tired to use Sedimentazione again!"))
       return -1
    end
    #if !attacker.pbHasType?(:ROCK)
    #  return -1
    #end
    if attacker.hp==attacker.totalhp
      @battle.pbDisplay(_INTL("{1}'s HPs are already at max!",attacker.pbThis))
      return -1
    end
    hpgain=(attacker.totalhp).floor
    pbShowAnimation(@id,attacker,nil,hitnum,alltargets,showanimation)
    attacker.pbRecoverHP(hpgain,true)
    @battle.pbDisplay(_INTL("{1}'s HPs have been restored.",attacker.pbThis))
    if attacker.pbCanReduceStatStage?(PBStats::SPEED,attacker,false,self)
      attacker.pbReduceStat(PBStats::SPEED,5,attacker,false,self)
    end
    return 0
  end
end

def pbAdditionalEffect(attacker,opponent)
    if opponent.effects[PBEffects::Substitute]==0 || ignoresSubstitute?(attacker)
      return opponent.pbFlinch(attacker)
      @tentenna=true
    end
    @tentenna=true
    return false
  end