[Feature] Added Battle Style setting (#1872)

* Added Battle Style setting with Shift and Set options

* Changed 'Shift' option to 'Switch' to match the Gen 8 setting.

src/battle-scene.ts

@@ -145,6 +145,12 @@ export default class BattleScene extends SceneBase {
   public fusionPaletteSwaps: boolean = true;
   public enableTouchControls: boolean = false;
   public enableVibration: boolean = false;
+  /**
+   * Determines the selected battle style.
+   * - 0 = 'Shift'
+   * - 1 = 'Set' - The option to switch the active pokemon at the start of a battle will not display.
+   */
+  public battleStyle: integer = 0;
 
   public disableMenu: boolean = false;
 

src/phases.ts

@@ -1667,6 +1667,11 @@ export class CheckSwitchPhase extends BattlePhase {
 
     const pokemon = this.scene.getPlayerField()[this.fieldIndex];
 
+    if (this.scene.battleStyle === 1) {
+      super.end();
+      return;
+    }
+
     if (this.scene.field.getAll().indexOf(pokemon) === -1) {
       this.scene.unshiftPhase(new SummonMissingPhase(this.scene, this.fieldIndex));
       super.end();

src/system/settings/settings.ts

@@ -42,6 +42,7 @@ export const SettingKeys = {
   EXP_Gains_Speed: "EXP_GAINS_SPEED",
   EXP_Party_Display: "EXP_PARTY_DISPLAY",
   Skip_Seen_Dialogues: "SKIP_SEEN_DIALOGUES",
+  Battle_Style: "BATTLE_STYLE",
   Enable_Retries: "ENABLE_RETRIES",
   Tutorials: "TUTORIALS",
   Touch_Controls: "TOUCH_CONTROLS",
@@ -107,6 +108,13 @@ export const Setting: Array<Setting> = [
     default: 0,
     type: SettingType.GENERAL
   },
+  {
+    key: SettingKeys.Battle_Style,
+    label: "Battle Style",
+    options: ["Switch", "Set"],
+    default: 0,
+    type: SettingType.GENERAL
+  },
   {
     key: SettingKeys.Enable_Retries,
     label: "Enable Retries",
@@ -348,6 +356,9 @@ export function setSetting(scene: BattleScene, setting: string, value: integer):
   case SettingKeys.Skip_Seen_Dialogues:
     scene.skipSeenDialogues = Setting[index].options[value] === "On";
     break;
+  case SettingKeys.Battle_Style:
+    scene.battleStyle = value;
+    break;
   case SettingKeys.Candy_Upgrade_Notification:
     if (scene.candyUpgradeNotification === value) {
       break;