diff --git a/FakeMon/src/mon/Game.scala b/FakeMon/src/mon/Game.scala
index e2c1d27..5867021 100644
--- a/FakeMon/src/mon/Game.scala
+++ b/FakeMon/src/mon/Game.scala
@@ -23,10 +23,11 @@ object Game {
     val movepool2 = IndexedSeq(Move("Absorb"))
     val p1 = TrainerID("Jaeda", Gender.Female, 0)
     val p2 = TrainerID("Wild Monster", Gender.Male, 0)
-    val party1 = new Party(p1, new MonsterPtr(new Monster(new StorageMon("Allied Mon", Gene.randomGene(null, form1), form1, Statistic.emptyEvs, movepool1))), IndexedSeq())
-    val party2 = new Party(p2, new MonsterPtr(new Monster(new StorageMon("Wild Mon", Gene.randomGene(null, form2), form2, Statistic.emptyEvs, movepool2))), IndexedSeq(
-        new Monster(new StorageMon("Sideboard Mon", Gene.randomGene(null, form2), form2, Statistic.emptyEvs, movepool2))
+    val party1 = new Party(p1, new MonsterPtr(new Monster(new StorageMon("Allied Mon", 500, Gene.randomGene(null, form1), form1, Statistic.emptyEvs, movepool1))), IndexedSeq())
+    val party2 = new Party(p2, new MonsterPtr(new Monster(new StorageMon("Wild Mon", 500, Gene.randomGene(null, form2), form2, Statistic.emptyEvs, movepool2))), IndexedSeq(
+        new Monster(new StorageMon("Sideboard Mon", 500, Gene.randomGene(null, form2), form2, Statistic.emptyEvs, movepool2))
         ))
+    println(form1.xpCurve)
     val engine = new BattleEngine(party1, party2)
     engine.play()
     println(party1.lead.elements)
diff --git a/FakeMon/src/mon/battle/BattleEngine.scala b/FakeMon/src/mon/battle/BattleEngine.scala
index c7fc44c..fa64e1f 100644
--- a/FakeMon/src/mon/battle/BattleEngine.scala
+++ b/FakeMon/src/mon/battle/BattleEngine.scala
@@ -9,6 +9,7 @@ import mon.util.Fraction
 class BattleEngine(val player: Party, val enemy: Party)(implicit val rng: Random) {
 
   def play() = {
+    println(player.lead.level)
     while (player.canFight && enemy.canFight) {
       playTurn()
     }
diff --git a/FakeMon/src/mon/stat/Form.scala b/FakeMon/src/mon/stat/Form.scala
index 4328d1c..6c31469 100644
--- a/FakeMon/src/mon/stat/Form.scala
+++ b/FakeMon/src/mon/stat/Form.scala
@@ -2,6 +2,8 @@ package mon.stat
 
 import scala.io.Source
 
+import com.fasterxml.jackson.module.scala.JsonScalaEnumeration
+
 import Statistic._
 
 import mon.util.YamlHelper
@@ -16,6 +18,7 @@ abstract class Form {
   // val appearance // animation
   // moves
   // abilities
+  val xpCurve : XpCurve
   val catchRate : Int
   // val color
   
@@ -29,6 +32,7 @@ case class FormToken(
     val desc : String,
     val elements : IndexedSeq[String],
     val baseStats : Map[String, Int],
+    @JsonScalaEnumeration(classOf[XpCurveType]) val xpCurve : XpCurve,
     val catchRate : Int = 255
     ) {
   
@@ -39,6 +43,7 @@ case class FormToken(
       val desc = self.desc
       val elements = self.elements.map(Element(_))
       val baseStats = self.baseStats.map{ case (s, i) => (Statistic(s), i)}
+      val xpCurve = self.xpCurve
       val catchRate = self.catchRate
     }
   }
@@ -47,16 +52,6 @@ case class FormToken(
 object Form {
   def apply(name : String) = byName(name)
   
-  def fromMap(dict : Map[String, Any]) = {
-    new Form {
-      val name = dict("name").toString
-      val desc = dict("desc").toString()
-      val elements = IndexedSeq()
-      val baseStats = Statistic.buildMap(_ => 10)
-      val catchRate = 255
-    }
-  }
-  
   val forms = YamlHelper.extractSeq[FormToken](Form.getClass.getResourceAsStream("data/forms.yaml")).map(_.instantiate())
   val byName = forms.map(f => (f.name, f)).toMap
 }
\ No newline at end of file
diff --git a/FakeMon/src/mon/stat/Gene.scala b/FakeMon/src/mon/stat/Gene.scala
index da43cee..df7fbe1 100644
--- a/FakeMon/src/mon/stat/Gene.scala
+++ b/FakeMon/src/mon/stat/Gene.scala
@@ -2,7 +2,7 @@ package mon.stat
 
 import scala.util.Random
 
-case class Gene(val gender : Gender, val ivs : Map[Stat, Int], ot : TrainerID) {
+case class Gene(val gender : Gender, val nature : Nature, val ivs : Map[Stat, Int], ot : TrainerID) {
   
 }
 
@@ -11,6 +11,6 @@ object Gene {
   def randomGene(ot : TrainerID, form : Form)(implicit rng : Random) = {
     val gender = Gender.Neuter // TODO
     val ivs = Statistic.values.map(s => (s, rng.nextInt(MaxIV + 1))).toMap
-    Gene(gender, ivs, ot)
+    Gene(gender, Nature.randomNature, ivs, ot)
   }
 }
\ No newline at end of file
diff --git a/FakeMon/src/mon/stat/Monster.scala b/FakeMon/src/mon/stat/Monster.scala
index 144a055..4b5155d 100644
--- a/FakeMon/src/mon/stat/Monster.scala
+++ b/FakeMon/src/mon/stat/Monster.scala
@@ -8,7 +8,7 @@ import Monster._
 import Statistic._
 
 class Monster(val base : StorageMon) {
-  val level = 10
+  def level = base.level
   val stats = Statistic.buildMap(computeStat)
   var boosts = Statistic.buildMap(_ => 0)
   var hp = stats(Hp)
@@ -49,10 +49,11 @@ class Monster(val base : StorageMon) {
     val num = 2 * base.form.baseStats(s) + base.gene.ivs(s) + base.evs(s) / 4
     val frac = num * level / 100
     val score = if(s == Hp) frac + 10 + level else frac + 5
-    score
+    (score * base.gene.nature(s)).toInt
   }
   
-  override def toString = base.nickname
+  def name = if (base.nickname != null) base.nickname else base.form.name
+  override def toString = name
 }
 
 object Monster {
diff --git a/FakeMon/src/mon/stat/Nature.scala b/FakeMon/src/mon/stat/Nature.scala
new file mode 100644
index 0000000..b71b3e0
--- /dev/null
+++ b/FakeMon/src/mon/stat/Nature.scala
@@ -0,0 +1,40 @@
+package mon.stat
+
+import scala.util.Random
+
+import Statistic._
+
+object Nature extends Enumeration {
+  case class Val protected(boosts : Map[Stat, Double]) extends super.Val {
+    def apply(s : Stat) = boosts.getOrElse(s, 1.0)
+  }
+  
+  val Hardy = Val(Map())
+  val Lonely = Val(Map(PAtk -> 1.1, PDef -> 0.9))
+  val Brave = Val(Map(PAtk -> 1.1, Speed -> 0.9))
+  val Adamant = Val(Map(PAtk -> 1.1, MAtk -> 0.9))
+  val Naughty = Val(Map(PAtk -> 1.1, MDef -> 0.9))
+  val Bold = Val(Map(PDef -> 1.1, PAtk -> 0.9))
+  val Docile = Val(Map())
+  val Relaxed = Val(Map(PDef -> 1.1, Speed -> 0.9))
+  val Impish = Val(Map(PDef -> 1.1, MAtk -> 0.9))
+  val Lax = Val(Map(PDef -> 1.1, MDef -> 0.9))
+  val Timid = Val(Map(Speed -> 1.1, PAtk -> 0.9))
+  val Hasty = Val(Map(Speed -> 1.1, PDef -> 0.9))
+  val Serious = Val(Map())
+  val Jolly = Val(Map(Speed -> 1.1, MAtk -> 0.9))
+  val Naive = Val(Map(Speed -> 1.1, MDef -> 0.9))
+  val Modest = Val(Map(MAtk -> 1.1, PAtk -> 0.9))
+  val Mild = Val(Map(MAtk -> 1.1, PDef -> 0.9))
+  val Quiet = Val(Map(MAtk -> 1.1, Speed -> 0.9))
+  val Bashful = Val(Map())
+  val Rash = Val(Map(MAtk -> 1.1, MDef -> 0.9))
+  val Calm = Val(Map(MDef -> 1.1, PAtk -> 0.9))
+  val Gentle = Val(Map(MDef -> 1.1, PDef -> 0.9))
+  val Sassy = Val(Map(MDef -> 1.1, Speed -> 0.9))
+  val Careful = Val(Map(MDef -> 1.1, MAtk -> 0.9))
+  val Quirky = Val(Map())
+  
+  def randomNature(implicit rng: Random) : Nature = rng.pick(natures)
+  val natures = values.toIndexedSeq.map(_.asInstanceOf[Val])
+}
\ No newline at end of file
diff --git a/FakeMon/src/mon/stat/StorageMon.scala b/FakeMon/src/mon/stat/StorageMon.scala
index 031258a..ad35a7f 100644
--- a/FakeMon/src/mon/stat/StorageMon.scala
+++ b/FakeMon/src/mon/stat/StorageMon.scala
@@ -1,5 +1,5 @@
 package mon.stat
 
-class StorageMon(val nickname : String, val gene : Gene, val form : Form, val evs : Map[Stat, Int], val moves : IndexedSeq[Move]) {
-  
+class StorageMon(val nickname : String, val xp: Int, val gene : Gene, val form : Form, val evs : Map[Stat, Int], val moves : IndexedSeq[Move]) {
+  def level = form.xpCurve(xp)
 }
\ No newline at end of file
diff --git a/FakeMon/src/mon/stat/XpCurve.scala b/FakeMon/src/mon/stat/XpCurve.scala
new file mode 100644
index 0000000..4056107
--- /dev/null
+++ b/FakeMon/src/mon/stat/XpCurve.scala
@@ -0,0 +1,15 @@
+package mon.stat
+
+import mon.util.TypeReference
+
+object XpCurve extends Enumeration {
+  case class Val protected(val curve: Int => Int) extends super.Val {
+    def apply(xp : Int) = curve(xp)
+  }
+  
+  val Fast = Val(xp => Math.cbrt(1.2 * xp).toInt)
+  val MediumFast = Val(xp => Math.cbrt(xp).toInt)
+  val MediumSlow = Val(xp => Math.cbrt(0.85 * xp).toInt)
+  val Slow = Val(xp => Math.cbrt(0.75 * xp).toInt)
+}
+class XpCurveType extends TypeReference[XpCurve.type]
\ No newline at end of file
diff --git a/FakeMon/src/mon/stat/data/forms.yaml b/FakeMon/src/mon/stat/data/forms.yaml
index b3ac151..8ea233a 100644
--- a/FakeMon/src/mon/stat/data/forms.yaml
+++ b/FakeMon/src/mon/stat/data/forms.yaml
@@ -9,6 +9,7 @@
     matk: 70
     mdef: 70
     spd: 60
+  xpCurve: MediumSlow
 
 - name: Diabolo
   desc: This is a ball of lightning from Hell itself.
@@ -21,4 +22,5 @@
     pdef: 30
     matk: 130
     mdef: 40
-    spd: 130
\ No newline at end of file
+    spd: 130
+  xpCurve: Slow
\ No newline at end of file
diff --git a/FakeMon/src/mon/stat/package.scala b/FakeMon/src/mon/stat/package.scala
index 07e8d6b..88fe6a0 100644
--- a/FakeMon/src/mon/stat/package.scala
+++ b/FakeMon/src/mon/stat/package.scala
@@ -11,7 +11,9 @@ package object stat {
   type Stat = Statistic.Value
   type MoveType = MoveType.Value
   type Gender = Gender.Value
+  type Nature = Nature.Val
   type Target = Target.Value
+  type XpCurve = XpCurve.Val
   
   implicit val formats = DefaultFormats + new EnumNameSerializer(MoveType) + new EnumNameSerializer(Gender)
   implicit def rngDice(rng : Random) = new Dice(rng)