Name the Battle Tower's ZABOROWSKI instead of refusing the battle

BattleTowerTrainers' names are ten bytes padded with "@" only when
shorter, and the cartridge copies the ten bytes to wOTPlayerName before
adding the terminator. The port read the name as an "@"-terminated
string, so drawing ZABOROWSKI (trainer 5) threw "Unterminated string."
and the challenge was refused.

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

tests/battle-tower.test.ts

@@ -3,7 +3,8 @@ import { existsSync, readFileSync } from "node:fs";
 import { CrystalAssets } from "../src/game/rom/assets";
 import { GameWorld } from "../src/game/world/world";
 import { calcStats, generatePartyMon, maxPP, type PartyMon } from "../src/game/party/pokemon";
-import { CHALLENGE } from "../src/game/scripts/battle-tower";
+import { CHALLENGE, emptyBattleTowerState, loadOpponent } from "../src/game/scripts/battle-tower";
+import type { SpecialContext } from "../src/game/scripts/special-context";
 import { Playthrough } from "./playthrough-driver";
 
 const romPath =
@@ -88,6 +89,26 @@ describe.skipIf(!existsSync(romPath))("the Battle Tower with the local ROM", ()
     expect(p.world.notice, p.world.diagnostic).toBe("");
   };
 
+  it("names a trainer whose name fills all ten characters", () => {
+    // BattleTowerTrainers' sixth entry, ZABOROWSKI, has no "@" of its own.
+    let seed = 5;
+    const context = {
+      reader: assets!.reader,
+      data: assets!.pokemon,
+      random: () => {
+        seed = (seed * 1103515245 + 12345) >>> 0;
+        return (seed >>> 16) & 255;
+      },
+      text: () => ({ player: "KAWA", rival: "SILVER", mom: "MOM", strings: {}, weekday: "SUNDAY" }),
+    } as unknown as SpecialContext;
+    const names = new Map<number, string>();
+    for (let draw = 0; draw < 300 && !names.has(5); draw++) {
+      const opponent = loadOpponent(context, { ...emptyBattleTowerState(), levelGroup: 1 });
+      names.set(opponent.trainer, opponent.name);
+    }
+    expect(names.get(5)).toBe("ZABOROWSKI");
+  });
+
   it("is reached from Route 40 through its gate", () => {
     const p = new Playthrough(assets!);
     p.world = new GameWorld(assets!, p.now, p.random);