CLOSES #1396, CLOSES #1398, CLOSES #1400, CLOSES #1401, CLOSES #1406, CLOSES #1407, CLOSES #1411, CLOSES #1413, CLOSES #1415, CLOSES #1416, CLOSES #1417, CLOSES #1419, CLOSES #1421, CLOSES #1422, CLOSES #1423, CLOSES #1424, CLOSES #1425, CLOSES #1427, CLOSES #1428, CLOSES #1429, CLOSES #1431, CLOSES #1432, CLOSES #1433, CLOSES #1435, CLOSES #1437, CLOSES #1440, CLOSES #1441, CLOSES #1442, CLOSES #1443, CLOSES #1447, CLOSES #1449, CLOSES #1456, CLOSES #1464, CLOSES #1465, CLOSES #1468, CLOSES #1469, CLOSES #1470

src/ui/PartyMenu.lua

@@ -313,6 +313,9 @@ function PartyMenu.new(game, opts)
   -- TM/HM display (ABLE / NOT ABLE per mon instead of the HP bar, and the
   -- "Use TM on which POKeMON?" prompt). Set by BagMenu.pickTargetAndUse. #210
   self.tmhm = opts.tmhm
+  -- Evolution stones: opts.evoStone = item id gives Gen 1's
+  -- EVO_STONE_PARTY_MENU ABLE / NOT ABLE display (party_menu.asm:114). #1411
+  self.evoStone = opts.evoStone
   self.forceSwitch = opts.forceSwitch
   self.battle = opts.battle
   self.party = party -- link/scoped battles pass their local party view
@@ -800,6 +803,20 @@ function PartyMenu:draw()
       else
         Font.draw(Strings("NOT ABLE"), 88, y + 8)
       end
+    elseif self.evoStone then
+      -- party_menu.asm:114 .evolutionStoneMenu: an EVOLVE_ITEM row matching
+      -- wEvoStoneItemID, printed in the TM/HM strings' row+1 column+9 slot
+      local can = false
+      for _, evo in ipairs(def.evolutions or {}) do
+        if evo.method == "ITEM" and evo.item == self.evoStone then
+          can = true break
+        end
+      end
+      if can then
+        Font.draw(Strings("ABLE"), 120, y + 8)
+      else
+        Font.draw(Strings("NOT ABLE"), 88, y + 8)
+      end
     else
       if mon.hp <= 0 then
         Font.draw(Strings("FNT"), 136, y)