Step 1  Where are they? 

Step 2 
Enter the level of each partied pokemon. Omit knocked out and egg pokemon. 
LVL: LVL: LVL: 
  Rarity  If the area chosen has NORARITY, then any one is chosen at random. Otherwise, the rarities are : 50% common, 33% uncommon, 17% rare 
+/  Level Variance  How many levels a spawned pokemon's level can differ from the average team level 
+/  Quantity Variance  How many more/less pokemon are spawned compared to the number in the team. If the trainer has one or less pokemon, there will only be one spawn. 
1 in  Shiny Probability  The probability that it is shiny 
1 in  Holds a Berry Probability  The probability that holds a random berry 
1 in  Drops a Random Item Probability  The probability that the a random item is found. It is possible for an item, TM, and Egg to all be found at once but the probability is astronomical. 
1 in  Drops a TM Probability  The probability that a TM is found. It is possible for an item, TM, and Egg to all be found at once but the probability is astronomical. 
1 in  Drops an Egg Probability  The probability that an egg is found. It is possible for an item, TM, and Egg to all be found at once but the probability is astronomical. 