New Pets...

Gray Wolf:
Can be purchased at stables in each town, and has the following traits
1) Has the ability to attack enemies, unlike any pet in the past
2) Gains experience and levels, making them a valuable asset in combat
3) Can change in appearance
4) It can die, and must be taken care of

White Wolf:
Can be purchased through the item mall, and has all the traits of the gray wolf
plus the fact that its white, and it cannot be sold or traded.

++++Taking care of your pet++++
-Recovery kits are purchasable from the stables, and are required to keep your
pets alive, only for HP healing purposes, not hunger recovering purposes
-Grass of life is also purchasable from the stable. This item will resurrect a
dead wolf.
-HGP recovery potion, also purchased from the stable, is an item that will deal
with your pet's hunger
-Abnormal status recovery potion is purchasable from stable. Take a wild guess
at what this does.

++++Pet facts++++
-In order to use the wolf pet, your character must be at least level 5
-A pet may not be summoned in the midst of battle, nor may it be summoned while
dead. Also, the pet may not be unsummoned during battle, or while dead.
-You may only have one Myowon (Monkey or Squirrel) and one Wolf (gray or white)
pet summoned simultaneously.
-To unsummon a pet, simply type /unsummon in the chat window, or click the
unsummon button at the lower right corner of the screen.
-While wearing an army cape, your pet will be automatically unsummoned.
-If the wolf pet dies, it will be automatically unsummoned.
-You may own a pet for an unlimited amount of time, and you may spend as much
time as you like coming up with a name for it. Unfortunately, you can only name
your pet once. So make it count.
-If the pet's level ever exceeds your own (through dying and level-down), it
will be impossible to summon until your level equals that of your pet. Once a
pet's level reaches your own, it will cease to gain experience until you
level up. When a pet levels up, its stat points are allocated automatically.
-When the HP or the Hunger (HGP) of a pet reaches 0, it will die, be unsummoned,
and will be unable to be summoned again until a grass of life is used on the
summon item.

Pets can be given commands either via the buttons at the lower right, or by
entering the commands into the chat window. The relevant commands are as
follows.
/attack; attacks a target
/unsummon; unsummons the pet
/offensive; when a character attacks, the pet does as well
/defensive; the pet will not attack unless commanded to do so
/follow; commands the pet to come close to the character

Using the pet to attack and kill a player will cause both the player and the pet
to achieve murderer status. Also, attacking the pet of a player will give the
player and the pet murderer status.
http://www.gamefaqs.com/computer/doswin/file/930711/43300