Adds Pokemon class registry for WASM

src/Battling/Pokemon/Pokemon.cpp

@@ -62,7 +62,7 @@ CreatureLib::Battling::Creature* PkmnLib::Battling::Pokemon::Clone() const {
         c->_status = _status.GetValue()->Clone(c);
     }
     _volatile.Clone(c, c->_volatile);
-    c->_types = std::vector<u8>(_types);
+    c->_types = ArbUt::List<u8>(_types);
     c->_friendship = _friendship;
     c->RecalculateFlatStats();