Read the English 1.0 and Australian cartridges besides 1.1 (#84)

PRET's crystal and crystal_au builds reproduce both retail cartridges,
and every label the profile pins keeps its address in all three;
check:reference now verifies that when the rebuilds are present. The
revision comes from the header. Revision 1.0's Battle Tower draws only
the first 21 trainers and picks its texts' gender from the name's sixth
character, checked against each cartridge. A native backup imports
across the three, which share every map, event and object.

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

tests/save-slots.test.ts

@@ -2,6 +2,7 @@ import { describe, expect, it } from "vitest";
 import "fake-indexeddb/auto";
 import { SlotSession, type SlotRuntime } from "../src/app/slot-session";
 import { encodeSave, type SaveRecord } from "../src/storage/saves";
+import { CRYSTAL_ROMS } from "../src/rom/validate";
 import {
   SlotRepository,
   recordChecksum,
@@ -411,6 +412,22 @@ describe("save slot import", () => {
     expect(runtime.game.steps).toBe(2);
   });
 
+  it("carries a backup over from another supported English cartridge", async () => {
+    const [us11, us10] = CRYSTAL_ROMS;
+    const context = setup();
+    await context.session.load({ ...ROM, sha1: us11.sha1, name: us11.name }, canvas);
+    const backup = record({ player: "KRIS", id: 5, steps: 3 });
+    const preview = await context.session.previewImport(encodeSave({ ...backup, romHash: us10.sha1 }));
+    if (!preview.ok) throw new Error(preview.reason);
+    expect(preview.madeWith).toBe(us10.name);
+    expect(preview.record.romHash).toBe(us11.sha1);
+    const added = await context.session.importBackup(preview, "new");
+    expect(added.romHash).toBe(us11.sha1);
+    // The same file under its own cartridge has nothing to carry over.
+    const own = await context.session.previewImport(encodeSave({ ...backup, romHash: us11.sha1 }));
+    expect(own.ok && own.madeWith).toBeUndefined();
+  });
+
   it("previews conflicts and imports as a new slot or over one", async () => {
     const { store, runtime, session } = await loaded();
     const first = session.active!;