• Monsters you start out with have DS of 1. Slime and Baby-D belong to their respective families, and Imp fall under Fiends.
• Level one monsters are found in the first few worlds.
• Level two monsters appear before Nasty Dungeon level four.
• Level three monsters appear from Venus volcano to Final Town.
• Level four monsters appear in Center of the World.
• You can only become level five monsters after eating TianLung or Fenrir's meat, and you stay at level five regardless of what level of meat you eat.

There are three classes of monsters (A, B, C). Generally, Class C monsters are better: Big-Eye/Beholder, Sprite/Titania, O-Bake/Ghost. Plasma and Grippe monsters behave like Slime. Apparently, human and robot enemies don't leave meat, but sometimes they leave items. There are four levels of these enemies, instead of five like the monsters because you never fight level five monsters.

When you eat a meat, add the number in column 4 or 5 (either one will work) of the meat monster to the number in the first column for your monster. Then Add class modifiers (A,B,C). You should end up with a number between 0 and 35, inclusive. That's the number in the first column, so that's the family your monster will become.

Example: The Baby-D that I started out with ate several samples of meat. Baby-D has 20 in first column. Add that to the meat's modifier in column 4 or 5, for example, Jaguar has modifier 9 or -27. Last, Baby-D is Class C and ate Class A Jaguar meat, so subtract 1. The result is 20+9-1=28, WereRat. You get the same result if you subtract 27 because then you would continue from the bottom starting with the O-Bake family. The Plasma and Grippe families are not counted. (They're there because they give meat.)

When adding, if you get a number larger than 35, continue from the top. And when subtracting, resume from the bottom if you get less than 0, starting with O-Bake.

Each monster has a DS level which corresponds to the area you can find the monster. After you find the family of monster you will become using the above method, you need to look in last column--DS level. This has five digits--one for each species in that family. This digit stands for its DS level.

When you eat a meat, the higher of the two DS level between the original and the meat is taken, ie maxlevel (orig, meat). This is compared to the DS level of each species in the new family you become, starting from the strongest to weakest. If your number is equal or greater than the species, then you become that species. Else, you compare to the next weaker species until you reach the condition above, or reach the weakest species in the family. If your maxlevel (orig, meat) is smaller than the weakest species in the family, then you become that species.

With this method, after you become the second strongest species in the family (level four monster), you can never do worse. Also, after you eat TianLung or Fenrir's meat, you will become the strongest in any family (level five monster) and can never do worse.

The DS level is in hex, which uses letters A and B for 10 and 11: 123456789AB.