There is pets in iris (costume part) already but i was thinking about this idea more,

We can make a pets system
each player (in every level) can have they own pet, we can get the pet, we can raise the pet, we can level the pet, and much more :3

For example:

The pet can heal the player when the players lose HP.
The pet can give more stats (of any kind: agility, wisdom, intelligence, etc...).
The pet can become into a sheild or another (little) attacker that can help to the player attack the enemy.

Before you can get the pet you need to get the egg first:
you can get the egg from dungeon drops,
or from farming a recipe, in the recipe you need to get few matarials to get the egg:
for example: x100 Spider Meat + x100 Spider Eggs +x100 Spider Legs + x100 Fairy's Powder = 1 spider egg or:
x100 Fairy's Powder + X100 Fairy's Marbles + x100 Fairy's Pieaces + x100 Spirit Marbles = 1 dragon egg. (you can make the recipe of any kind of matarials you want) or:
you can buy it in the shop for othe mats, for example you can trade mats (see at my house system) for pet egg
When you get the Egg you need to get another recipe, and another matarials, after you get them all you can hatch the egg and you can get your pet. when you get your pet he/she will be level 1 and you can train/feed her/him to level up the pet:
you can train it in special map/train room/special food that you cn get from special recipe, plus you can train it in many ways, you can level it up, you can level the pet's skills, you can level up the stats of the pet too. (each food for leveling up the pet can get from special recipe too, the recipe can be farmed from dungeons/mobs).

There can be breeding system too, diferent pets of diferent players can breed together new pets, the players dont have to be couples or something like that.

We can alse have pets duels/battles: we can duel with our pets in diferent zone, we can bet with gold/mats/etc on the battle.
we can have alse race between pets, little zone where players can get into their pets can race in obstacle course/
we can alse make special map traning for pets, where all pets can be train in many categories.


~thats all i can write so far, if you have question you can write it in the comments and ill answer it ^^ ~
~sorry about my bad english x3 ~
~i gave my idea about this pet system but you can change it as you wish :3 ~
~the House System and the Pet System can be connected if you wish, but they can be not connected, its up to the GMs ^^ ~