Does anyone know what amount of xp is required for my pet to get 10% resist. I have 9% resist, and I am wondering how long it will take me to get 10% 120
To get max resist from spellproof, you'll need Strength and Agility to both be over 235, and Power to be 230 or higher. Try to get them all as close to 250 as possible, the higher the better.
If your current pet doesn't have such high stats, you can equip a star jewel to boost them, or try to hatch a stronger stat pet with the spellproof talent.