I have no idea why people insist on posting things like this, and not including the error itself.
If it gives an error, you can find it in your debug log, or just copy it when it shows up. Scripters aren't magic, it's often unlikely a vague description will actually point them in the right direction.
Not that it really matters in this thread, but it's the principle
(Heres what happens when Curse is used or Moody is activated sorry if i didnt show what it shows) (I was on vacation so sorry if i didnt respond for a bit)
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Pokemon KE and CS Developers Version
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Exception: NoMethodError
Message: undefined method `hasBypassingAbility' for false:FalseClass
PokeBattle_BattlerEffects:774:in `pbIncreaseStatBasic'
PokeBattle_BattlerEffects:836:in `pbIncreaseStat'
PokeBattle_MoveEffects:7177:in `pbEffect'
PokeBattle_Battler:3475:in `pbUseMove_org'
PokeBattle_Battler:3474:in `logonerr'
PokeBattle_Battler:3474:in `pbUseMove_org'
EliteBattle Battle:489:in `pbUseMove'
PokeBattle_Battler:3718:in `pbProcessTurn'
PokeBattle_Battler:3717:in `logonerr'
PokeBattle_Battler:3717:in `pbProcessTurn'
This exception was logged in
C:\Users\#####\Saved Games/Pokemon KE and CS Developers Version/errorlog.txt.
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OK
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