>>529515359
Pet evolutions are purely cosmetic, you keep the stats of the original pet.
Also, the game makes a distinction between the Earth Petite that is evolved, and the tamed one. They are entirely different.
The one that is directly tamed has no stats.

>>529497506
What >>529498470 is correct, I went over the max size allowed on Rentry. I've put a notice at the bottom explaining, so that returning players like yourself can figure out what's going on.