This should work how you'd like, customization at the top

CODE
#==============================================================================
# Title: Evade State
# Version: 1.0
# Author: The Law G14
#==============================================================================
module Customization
# The State ID that causes 100% Evasion
STATE_ID = 1
end
#==============================================================================
# ** Game_Battler
#------------------------------------------------------------------------------
# This class deals with battlers. It's used as a superclass for the Game_Actor
# and Game_Enemy classes.
#==============================================================================
class Game_Battler
#--------------------------------------------------------------------------
# * Alias Listing
#--------------------------------------------------------------------------
alias law_state_evade_game_battler_hit hit
#--------------------------------------------------------------------------
# * Get Hit Rate
#--------------------------------------------------------------------------
def hit
# If customized state is on
if @states.include?(Customization::STATE_ID)
# Return 0
return 0
else
# Call original method
law_state_evade_game_battler_hit
end
end
end