diff --git a/src/field/pokemon.ts b/src/field/pokemon.ts
index 43bab0f049d..c3b3ce86473 100644
--- a/src/field/pokemon.ts
+++ b/src/field/pokemon.ts
@@ -2991,6 +2991,10 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       shinyThreshold.value = thresholdOverride;
     }
 
+    if (!isNullOrUndefined(Overrides.OPP_SHINY_CHANCE_OVERRIDE)) {
+      shinyThreshold.value = Overrides.OPP_SHINY_CHANCE_OVERRIDE;
+    }
+
     this.shiny = (E ^ F) < shinyThreshold.value;
 
     if (this.shiny) {
diff --git a/src/overrides.ts b/src/overrides.ts
index 882a634ff90..e91cfd72351 100644
--- a/src/overrides.ts
+++ b/src/overrides.ts
@@ -166,6 +166,7 @@ class DefaultOverrides {
   readonly OPP_GENDER_OVERRIDE: Gender | null = null;
   readonly OPP_MOVESET_OVERRIDE: Moves | Array<Moves> = [];
   readonly OPP_SHINY_OVERRIDE: boolean | null = null;
+  readonly OPP_SHINY_CHANCE_OVERRIDE: number | null = null; // Max value 65536
   readonly OPP_VARIANT_OVERRIDE: Variant | null = null;
   readonly OPP_IVS_OVERRIDE: number | number[] = [];
   readonly OPP_FORM_OVERRIDES: Partial<Record<Species, number>> = {};