Open Route 31, Violet City and Sprout Tower (#31)

Enable Route 31 and its gate, Dark Cave's Violet entrance, Violet City with its buildings and Sprout Tower. Port the script commands they use: gettrainername, askforphonenumber (with AddPhoneNumber's room for Mom and Elm; addcellnum now reports failure as the original does), checkpokemail, loadmenu/_2dmenu/closewindow, giveegg and trade (NPCTrade, with wTradeFlags saved).

Eggs keep their species with an egg flag, as wPartySpecies does. The pack's TM/HM counts receive, check and toss TMs and HMs, which are named TM01-HM07.

The playthrough continues through Route 31 (with Mom's call), Violet City and Sprout Tower to Elder Li's Flash.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/mail.test.ts

@@ -15,8 +15,7 @@ const romPath =
   "Pokemon - Crystal Version (UE) (V1.1) [C][!].gbc";
 const POKEMON_CENTER = "26:5",
   CYNDAQUIL = 155,
-  PIDGEY = 16,
-  EGG = 0xfd;
+  PIDGEY = 16;
 const POTION = 0x12,
   BERRY = 0xad,
   FLOWER_MAIL = 0x9e,
@@ -282,7 +281,8 @@ describe.skipIf(!existsSync(romPath))("MAIL", () => {
     ];
     world.state.party.push({
       ...structuredClone(world.state.party[1]),
-      species: EGG,
+      egg: true,
+      nickname: "EGG",
     });
     mailbox(world);
     expect(menuItems(world)).toEqual([