diff --git a/src/enums/battler-index.ts b/src/enums/battler-index.ts
index 32b1684c86c..253e5bfc3ed 100644
--- a/src/enums/battler-index.ts
+++ b/src/enums/battler-index.ts
@@ -1,3 +1,7 @@
+/**
+ * The index of a given Pokemon on-field.
+ * Used as an index into `globalScene.getField`, as well as for most target-specifying effects.
+ */
 export enum BattlerIndex {
   ATTACKER = -1,
   PLAYER,