diff --git a/contracts/PokemonFactory.sol b/contracts/PokemonFactory.sol
index 2926c786..f00ff946 100644
--- a/contracts/PokemonFactory.sol
+++ b/contracts/PokemonFactory.sol
@@ -3,6 +3,8 @@
 pragma solidity >=0.7.0 <0.9.0;
 
 contract PokemonFactory {
+  uint _id;
+  
   event eventNewPokemon(Pokemon pokemon);
 
   struct Pokemon {
@@ -10,6 +12,7 @@ contract PokemonFactory {
     string name;
     Ability[] abilities;
     string[] pokemonType;
+    string[] weaknesses;
   }
 
   struct Ability {
@@ -23,33 +26,48 @@ contract PokemonFactory {
   mapping(address => uint256) public ownerPokemonCount;
   mapping(address => mapping(uint => Pokemon)) ownedPokemons;
 
-  function createPokemon(string memory _name, string[] memory _abilityName, string[] memory _abilityDscription, string[] memory _type) public {
-    require(bytes(_name).length > 2, "The name must have at least 2 characters.");
-    require((_abilityName).length == (_abilityDscription).length, "You have to provide the same number of abilitie and description.");
+  modifier checkData
+    (uint _id, string memory _name, string[] memory _abilityName, string[] memory _abilityDescription, string[] memory _type, string[] memory _weaknesses) {
+      require(bytes(_name).length > 2, "The name must have at least 2 characters.");
+      require((_abilityName).length == (_abilityDescription).length, "You must provide the name of each ability for each ability description.");
 
-    uint _id = pokemons.length;
-    require(bytes((_abilityName)[_id]).length > 3, "The name must have at least 3 characters.");
-    require(bytes((_abilityDscription)[_id]).length > 5, "The description must have at least 5 characters.");
-    
-    pokemons.push();
-    pokemons[_id].id = _id;
-    pokemons[_id].name = _name;
+      for(uint i=0; i<_weaknesses.length; i++) {
+        require(bytes((_weaknesses)[i]).length > 3, "The weakness name must have at least 3 characters.");
+      }
 
-    for(uint i=0; i<_type.length; i++) {
-      require(bytes((_type)[i]).length > 3, "The type must have at least 3 characters.");
-    }
+      for(uint i=0; i<_type.length; i++) {
+        require(bytes((_type)[i]).length > 3, "The type must have at least 3 characters.");
+      }
 
-    pokemons[_id].pokemonType = _type;
+      for(uint i=0; i<_abilityName.length; i++) {
+        require(bytes((_abilityName)[_id]).length > 3, "The ability name must have at least 3 characters.");
+        require(bytes((_abilityDescription)[_id]).length > 5, "The ability description must have at least 5 characters.");
+      }
 
-    for(uint i=0; i<_abilityName.length; i++) {
-      pokemons[_id].abilities.push(
-        Ability(_abilityName[i], _abilityDscription[i])
-      );
-    }
+      _;
+  }
+
+  function createPokemon
+    (string memory _name, string[] memory _abilityName, string[] memory _abilityDescription, string[] memory _type, string[] memory _weaknesses) 
+    public 
+    checkData(_id, _name, _abilityName, _abilityDescription, _type, _weaknesses) {
+      _id = pokemons.length;
+
+      pokemons.push();
+      pokemons[_id].id = _id;
+      pokemons[_id].name = _name;
+      pokemons[_id].pokemonType = _type;
+      pokemons[_id].weaknesses = _weaknesses;
+
+      for(uint i=0; i<_abilityName.length; i++) {
+        pokemons[_id].abilities.push(
+          Ability(_abilityName[i], _abilityDescription[i])
+        );
+      }
 
-    pokemonToOwner[_id] = msg.sender;
-    ownerPokemonCount[msg.sender]++;
-    emit eventNewPokemon(pokemons[_id]);
+      pokemonToOwner[_id] = msg.sender;
+      ownerPokemonCount[msg.sender]++;
+      emit eventNewPokemon(pokemons[_id]);
   }
 
   function getAllPokemons() public view returns (Pokemon[] memory) {