diff --git a/stats/src/reports.ts b/stats/src/reports.ts
index 965b9d0..abcba39 100644
--- a/stats/src/reports.ts
+++ b/stats/src/reports.ts
@@ -480,6 +480,30 @@ export const Reports = new class {
   }
 };
 
+const BL: {[tier in Tier]?: Set<string>} = {
+  UU: new Set([
+    'hawlucha', 'dracozolt', 'diggersby', 'durant', 'weavile', 'ninetalesalola', 'gyarados',
+    'primarina', 'venusaur', 'haxorus', 'aegislash', 'conkeldurr', 'gengar', 'scolipede',
+    'lycanrocdusk',
+  ]),
+  RU: new Set([
+    'barbaracle', 'pangoro', 'shiftry', 'slurpuff', 'chansey', 'indeedee', 'raichualola', 'linoone',
+    'sharpedo', 'zoroark', 'lucario', 'reuniclus', 'sirfetchd', 'heracross', 'sigilyph',
+  ]),
+  NU: new Set([
+    'slurpuff', 'scrafty', 'haunter', 'linoone', 'chansey', 'indeedeef', 'porygon2', 'tauros',
+    'exeggutoralola', 'sneasel', 'snorlax', 'zygarde10', 'tyrantrum', 'kingdra',
+  ]),
+  PU: new Set([
+    'arctozolt', 'arctovish', 'silvally', 'noctowl', 'silvallyground', 'silvallyfire',
+    'silvallyflying', 'silvallyfighting', 'scyther', 'magneton', 'porygon2', 'basculin',
+    'hitmontop', 'silvallypsychic', 'silvallyelectric', 'silvallygrass', 'rotomfrost', 'orbeetle',
+    'butterfree', 'golurk', 'flapple', 'thievul', 'sawk', 'galvantula', 'silvallydark', 'exeggutor',
+    'mesprit', 'guzzlord', 'magmortar', 'zygarde10', 'kingler', 'absol',
+  ]),
+  ZU: new Set(['silvallyelectric', 'thwackey', 'ludicolo', 'musharna', 'grapploct', 'swoobat']),
+};
+
 function usageTiers<T>(
   type: 'singles' | 'doubles' | 'nationaldex' | 'littlecup' = 'singles', t: T
 ): UsageTiers<T> | DoublesUsageTiers<T> | NationalDexUsageTiers<T> | LittleCupUsageTiers<T> {
@@ -535,32 +559,6 @@ function updateTiers(
     return cosmeticFormes;
   }).flat());
 
-  const getBL = (tier: Tier): Tier => {
-    switch (tier) {
-      case 'OU':
-        return 'Uber';
-      case 'UU':
-        return 'UUBL';
-      case 'RU':
-        return 'RUBL';
-      case 'NU':
-        return 'NUBL';
-      case 'PU':
-        return 'PUBL';
-      case 'ZU':
-        return 'ZUBL';
-      default:
-        // Tier is already a banlist (is a BL or Uber)
-        return tier;
-    }
-  };
-
-  const BL: {[tier in Tier]?: Set<ID>} = {};
-  (['UU', 'RU', 'NU', 'PU', 'ZU'] as Tier[]).forEach(tier => {
-    BL[tier] = new Set(Array.from(gen.species).filter(specie => specie.tier === getBL(tier))
-      .map(specie => specie.id));
-  });
-
   for (const species of gen.species) {
     if (SKIP.has(species.id) ||
       species.isNonstandard ||