Take the icon sheet's base-forme slots from a generated dex table

ps-pokemon.sheet.mjs reads entry.num out of data/species.json to place a
base species on the sheet, which is the last thing in the build that
needs a number from that table. Move it to ps-pokemon.dexnums.mjs,
generated from pokemon-showdown alongside the hand-kept alt-forme index
table the file already carries.

The sheet is nameSensitive and rebuilt: pokemonicons-sheet.png hashes
the same before and after, and all three deploys materialize byte for
byte identically.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MQicnpaee6kQXGG7uVExLS

ps-pokemon.sheet.mjs

@@ -4,6 +4,8 @@ import path from 'path';
 import * as spritedata from '@smogon/sprite-data/index.ts';
 import root from '@smogon/sprite-root/index.ts';
 
+import {DEX_NUMS} from './ps-pokemon.dexnums.mjs';
+
 const srcDir = path.join(root, "src");
 const spritesDir = path.join(srcDir, "minisprites/pokemon/gen6");
 
@@ -687,8 +689,10 @@ for (const name of fs.readdirSync(spritesDir)) {
     }
     
     if (index === undefined) {
+        // A base species sits at the slot named by its dex number; only alt
+        // formes need the hand-kept table above.
         if (entry && !entry.forme) {
-            index = entry.num;
+            index = DEX_NUMS[toPSID(entry.base)];
         } else {
             errors.push(`can't find ${name}`);
             continue;

ps.build.ts

@@ -22,7 +22,7 @@ let sheetDeps = [
 rule('ps-pokemon.sheet.mjs', {
     display: 'ps pokemon sheet',
     nameSensitive: true,
-    deps: ['src/minisprites/pokemon/gen6/*', ...sheetDeps],
+    deps: ['src/minisprites/pokemon/gen6/*', 'ps-pokemon.dexnums.mjs', ...sheetDeps],
     cmds: ['node tools/sheet/index.ts %f %o', compresspng({config: 'SPRITESHEET'})],
 }, 'pokemonicons-sheet.png');
 

tools/spritedata/dexnums.ts

@@ -0,0 +1,36 @@
+import {createRequire} from 'node:module';
+import * as path from 'node:path';
+
+// Regenerates ps-pokemon.dexnums.mjs from a pokemon-showdown checkout:
+//
+//   node tools/spritedata/dexnums.ts ~/smogon/pokemon-showdown > ps-pokemon.dexnums.mjs
+//
+// The PS icon sheet puts a base species at the slot named by its dex number,
+// and only alt formes need the hand-kept index table in ps-pokemon.sheet.mjs.
+
+type PokedexEntry = {
+    num: number,
+    name: string,
+    baseSpecies?: string
+};
+
+let ps = process.argv[2];
+if (!ps) {
+    throw new Error('usage: node tools/spritedata/dexnums.ts <pokemon-showdown checkout>');
+}
+
+let require = createRequire(import.meta.url);
+let {Pokedex} = require(path.resolve(ps, 'dist/data/pokedex.js')) as
+    {Pokedex: Record<string, PokedexEntry>};
+
+let out = '';
+out += '// Generated by tools/spritedata/dexnums.ts; do not edit.\n';
+out += '// PS id of every base species -> its national dex number.\n\n';
+out += 'export const DEX_NUMS = {\n';
+for (let {num, name, baseSpecies} of Object.values(Pokedex)) {
+    if (baseSpecies) continue;
+    out += `\t${name.toLowerCase().replace(/[^a-z0-9]+/g, '')}: ${num},\n`;
+}
+out += '};\n';
+
+process.stdout.write(out);