diff --git a/calc.js b/calc.js
index 24b893c..26dd802 100644
--- a/calc.js
+++ b/calc.js
@@ -1,12 +1,13 @@
-import calc, {
+import {
   calculate,
-  Generations,
   Field,
+  Generations,
   Move,
   Pokemon,
+  Result,
 } from "@ajhyndman/smogon-calc";
 import assert from "assert";
-import chev, { Lexer } from "chevrotain";
+import { createToken, Lexer } from "chevrotain";
 
 const gen = Generations.get(9);
 
@@ -16,65 +17,61 @@ const gen = Generations.get(9);
  * @returns {Lexer}
  */
 function buildLexer() {
-  const Boost = chev.createToken({ name: "Boost", pattern: /[+-]\d+/ });
-  const EV = chev.createToken({ name: "EV", pattern: /\d+[+-]?/ });
-  const Stat = chev.createToken({
+  const Boost = createToken({ name: "Boost", pattern: /[+-]\d+/ });
+  const EV = createToken({ name: "EV", pattern: /\d+[+-]?/ });
+  const Stat = createToken({
     name: "Stat",
     pattern: /HP|Atk|Def|SpA|SpD|Spe/,
   });
 
-  const Item = chev.createToken({
+  const Item = createToken({
     name: "Item",
-    pattern: new RegExp(calc.ITEMS.flatMap((gen) => gen).join("|")),
+    pattern: new RegExp([...gen.items].map((i) => i.name).join("|")),
   });
-  const Ability = chev.createToken({
+  const Ability = createToken({
     name: "Ability",
-    pattern: new RegExp(calc.ABILITIES.flatMap((gen) => gen).join("|")),
+    pattern: new RegExp([...gen.abilities].map((a) => a.name).join("|")),
   });
 
-  const Pokemon = chev.createToken({
+  const Pokemon = createToken({
     name: "Pokemon",
-    pattern: new RegExp(
-      calc.SPECIES.flatMap((gen) => Object.keys(gen)).join("|")
-    ),
+    pattern: new RegExp([...gen.species].map((s) => s.name).join("|")),
   });
-  const Move = chev.createToken({
+  const Move = createToken({
     name: "Move",
-    pattern: new RegExp(
-      calc.MOVES.flatMap((gen) => Object.keys(gen)).join("|")
-    ),
+    pattern: new RegExp([...gen.moves].map((m) => m.name).join("|")),
   });
 
-  const whitespace = chev.createToken({
+  const whitespace = createToken({
     name: "Whitespace",
     pattern: /\s+/,
     group: Lexer.SKIPPED,
   });
-  const div = chev.createToken({
+  const div = createToken({
     name: "div",
     pattern: "/",
     group: Lexer.SKIPPED,
   });
-  const vs = chev.createToken({
+  const vs = createToken({
     name: "vs",
     pattern: /vs\.?/,
   });
 
-  const terrainEnter = chev.createToken({
+  const terrainEnter = createToken({
     name: "terrainEnter",
     pattern: "in",
     push_mode: "terrain_mode",
   });
-  const Weather = chev.createToken({
+  const Weather = createToken({
     name: "Weather",
     pattern: /Sun|Rain|Sand|Snow/,
   });
-  const Terrain = chev.createToken({
+  const Terrain = createToken({
     name: "Terrain",
     pattern: /(Electric|Grassy|Misty|Psychic) Terrain/,
   });
 
-  const screenEnter = chev.createToken({
+  const screenEnter = createToken({
     name: "screenEnter",
     pattern: "through",
     push_mode: "screen_mode",
@@ -117,7 +114,7 @@ function* iterate(arr) {
 
 /**
  * @param {string} type token type
- * @param {chev.IToken} token token
+ * @param {import("chevrotain").IToken} token token
  * @return {string} matched token
  */
 function unwrapToken(type, token) {
@@ -155,7 +152,7 @@ const NEG_NATURES = {
  * through Light Screen
  *
  * @param {string} line textual line
- * @return {calc.Result} calculation result
+ * @return {Result} calculation result
  */
 function parseAndCalculate(line) {
   const lexer = buildLexer();
@@ -169,14 +166,14 @@ function parseAndCalculate(line) {
   /** @type {string} */
   var defender;
 
-  /** @type {calc.State.Pokemon} */
+  /** @type {import("@ajhyndman/smogon-calc").State.Pokemon} */
   var attackerOpts = {};
-  /** @type {calc.State.Pokemon} */
+  /** @type {import("@ajhyndman/smogon-calc").State.Pokemon} */
   var defenderOpts = {};
 
   /** @type {string} */
   var move;
-  /** @type {calc.State.Field} */
+  /** @type {import("@ajhyndman/smogon-calc").State.Field} */
   var field = {};
 
   // Tokenising state.
@@ -216,7 +213,7 @@ function parseAndCalculate(line) {
         }
         break;
       case "Stat":
-        throw Error("Impossibel state: bare Stat");
+        throw Error("Impossible state: bare Stat");
       case "Item":
         opts().item = unwrapToken("Item", item);
         break;
@@ -269,9 +266,11 @@ function parseAndCalculate(line) {
   }
 
   // Pre-checking before the calculator throws unreadable errors.
-  if (!gen.species.get(attacker)) throw Error(`No species ${attacker}`);
-  if (!gen.species.get(defender)) throw Error(`No species ${attacker}`);
-  if (!gen.moves.get(move)) throw Error(`No move ${move}`);
+  if (!gen.species.get(attacker.toLowerCase()))
+    throw Error(`No species named ${attacker}`);
+  if (!gen.species.get(defender.toLowerCase()))
+    throw Error(`No species named ${defender}`);
+  if (!gen.moves.get(move.toLowerCase())) throw Error(`No move named ${move}`);
 
   return calculate(
     gen,