How do i level up my knight pet?

[TheLostDuck]

I have a knight pet that i want to lvl up but havent found a way to.

 

[aeserior]

I am not sure, I don't think it has a fixed timing?

 

[loridasmc]

So it only takes time to level up your pet?

 

[Yvhou]

Probabaly using pet exp? Idk too lol since I don't have a pet