[Bug] Fix sketch being able to copy some unsketchable moves (#3386)

* Cherrypicks due to beta issues

* Adds flags to some unsketchable moves, adds typedoc

* Cherrypicks due to beta issues #2

src/data/move.ts

@@ -5419,10 +5419,26 @@ export class MovesetCopyMoveAttr extends OverrideMoveEffectAttr {
   }
 }
 
+/**
+ * Attribute for {@linkcode Moves.SKETCH} that causes the user to copy the opponent's last used move
+ * This move copies the last used non-virtual move
+ *  e.g. if Metronome is used, it copies Metronome itself, not the virtual move called by Metronome
+ * Fails if the opponent has not yet used a move.
+ * Fails if used on an uncopiable move, listed in unsketchableMoves in getCondition
+ * Fails if the move is already in the user's moveset
+ */
 export class SketchAttr extends MoveEffectAttr {
   constructor() {
     super(true);
   }
+  /**
+   * User copies the opponent's last used move, if possible
+   * @param {Pokemon} user Pokemon that used the move and will replace Sketch with the copied move
+   * @param {Pokemon} target Pokemon that the user wants to copy a move from
+   * @param {Move} move Move being used
+   * @param {any[]} args Unused
+   * @returns {boolean} true if the function succeeds, otherwise false
+   */
 
   apply(user: Pokemon, target: Pokemon, move: Move, args: any[]): boolean {
     if (!super.apply(user, target, move, args)) {
@@ -5453,14 +5469,28 @@ export class SketchAttr extends MoveEffectAttr {
         return false;
       }
 
-      const targetMoves = target.getMoveHistory().filter(m => !m.virtual);
+      const targetMove = target.getMoveHistory().filter(m => !m.virtual).at(-1);
-      if (!targetMoves.length) {
+      if (!targetMove) {
         return false;
       }
 
-      const sketchableMove = targetMoves[0];
+      const unsketchableMoves = [
+        Moves.CHATTER,
+        Moves.MIRROR_MOVE,
+        Moves.SLEEP_TALK,
+        Moves.STRUGGLE,
+        Moves.SKETCH,
+        Moves.REVIVAL_BLESSING,
+        Moves.TERA_STARSTORM,
+        Moves.BREAKNECK_BLITZ__PHYSICAL,
+        Moves.BREAKNECK_BLITZ__SPECIAL
+      ];
 
-      if (user.getMoveset().find(m => m.moveId === sketchableMove.move)) {
+      if (unsketchableMoves.includes(targetMove.move)) {
+        return false;
+      }
+
+      if (user.getMoveset().find(m => m.moveId === targetMove.move)) {
         return false;
       }