Resource [v13+] Pokémon Selection 1.3.3

# Instead of calling 'PokemonSelection.choose', call
# 'PokemonSelection.chooseChangingLevels'.
# The party will be cloned, allowing level adjustment settings, and it will be
# restored when 'PokemonSelection.restore' is called.
# Example for level 50:
#  challenge = PokemonChallengeRules.new
#  challenge.setLevelAdjustment(FixedLevelAdjustment.new(50))
#  pr = PokemonSelection::Parameters.new
#  pr.setBaseChallenge(challenge)
#  PokemonSelection.chooseChangingLevels(pr)
module PokemonSelection
  def self.chooseChangingLevels(*args)
    if $PokemonGlobal.pokemonSelectionOriginalParty
      raise "Can't choose a new party until restore the old one!"
    end
    params = Parameters.factory(*args)
    if !hasValidTeam?(params)
      raise "Player doesn't have a valid team!"
    end
    validPartyChosen=false
    pbBattleChallenge.setSimple(params.challenge)
    loop do
      pbEntryScreen
      validPartyChosen = pbBattleChallenge.getParty!=nil
      break if (params.canCancel || pbBattleChallenge.getParty)
      pbMessage(_INTL("Choose a Pokémon."))
    end
    if validPartyChosen
      $PokemonGlobal.pokemonSelectionOriginalParty=$player.party
      $player.party=pbBattleChallenge.getParty.map{|pk| pk.clone}
      params.challenge.adjustLevels($player.party, $player.party)
    end
    pbBattleChallenge.pbCancel
    return validPartyChosen
  end
end