diff --git a/src/data/ability.ts b/src/data/ability.ts
index e8370fb511e..26734842283 100644
--- a/src/data/ability.ts
+++ b/src/data/ability.ts
@@ -1542,6 +1542,7 @@ export class DownloadAbAttr extends PostSummonAbAttr {
   private enemySpDef: integer;
   private stats: BattleStat[];
   
+  // TODO: Implement the Substitute feature(s) once move is implemented.
   /**
    * Checks to see if it is the opening turn (starting a new game), if so, Download won't work. This is because Download takes into account 
    * vitamins and items, so it needs to use the BattleStat and the stat alone.