From what I've seen many people are trying to figure out how much exp a pet gains from different dungeons, pvp and attack usage. I've experimented on the many variables that might affect the pet's exp rate and concluded on this:
1. Attacking with your pet does NOT give it extra exp it just adds onto your damage.
2. Different dungeons do NOT affect the pet's exp rate. Therefore you can do trial forest 1 star, and Kastulle Ruins Upper Floor 3 star and get the same amount of exp per run.
3. The pet's exp rate is 3 times its own level. Meaning if you have a lvl 5 pet then u get 15 exp per dungeon run.
The above is based on my own research and I am not 100% sure myself. The information is based on the slime pet and dungeons runs. It is not for Pvp and/or other kinds of pets. Though I think other pets' exp rate is the same. If you would like to test my information out then go ahead. If you don't think my information is correct please feel free to correct me.
Takyi:I know but some people want to know EXACTLY how much exp their pet gains and as i said before it gains 3 times its own lvl. I haven't seen anyone say that tho I am not 100% sure im correct.
From Lv0 and up to Lv3, you gain 3 exp per level. At Lv3, you start to gain 9 exp. And 3x your level after that point. At least, that's what I noticed. ;x
And I also heard that there's a limit to what dungeon you can use to level your pet. For example, if you're Lv30, you can no longer do anywhere in Bermesiah, since your character is outside of the level range of any of the dungeons there. I haven't attempted to test this though, just something someone told me.
-Atrophy