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>

src/game/rom/profile.ts

@@ -57,6 +57,8 @@ export const SYMBOLS = {
   pocketIsFullText: 0x97060,
   findItemInBallScript: 0x122ce,
   caughtAskNicknameText: 0x4db44,
+  stringEgg: 0xe035,
+  tmhmMoves: 0x1167a,
   nicknameStrings: 0x11780,
   rivalNameString: 0x117c3,
   rivalDefaultName: 0xc2b2,
@@ -194,6 +196,11 @@ export const ENGINE_FLAGS = {
 /** Overworld scripts, routines and tables, keyed by their PRET labels so
  * that `npm run check:reference` verifies each address by name. */
 export const OVERWORLD = {
+  NPCTrades: 0xfce58,
+  TradeTexts: 0xfcf53,
+  NPCTradeCableText: 0xfcf7b,
+  TradedForText: 0xfcf80,
+  "TradedForText.done": 0xfcf92,
   BugCatchingContestBattleScript: 0x135eb,
   ContestMons: 0x97d87,
   "OverworldTownMap": 0xc2c0,
@@ -1028,5 +1035,18 @@ export const NATIVE_MAPS: Record<string, string> = {
   "26:8": "Evolution speech house",
   "26:9": "Berry house",
   "26:10": "Mr. Pokémon’s house",
+  "26:2": "Route 31",
+  "26:11": "Route 31 Violet gate",
+  "3:78": "Dark Cave",
+  "10:5": "Violet City",
+  "10:6": "Violet Mart",
+  "10:7": "Violet Gym",
+  "10:8": "Earl’s Pokémon Academy",
+  "10:9": "Nickname speech house",
+  "10:10": "Pokémon Center",
+  "10:11": "Kyle’s house",
+  "3:1": "Sprout Tower 1F",
+  "3:2": "Sprout Tower 2F",
+  "3:3": "Sprout Tower 3F",
 };
 export const INITIAL_POSITION = { map: "24:7", x: 3, y: 3 } as const;