Now your red pets will become stronger! You can add additional stats to them in the Backpack - Pets menu. Green "Old Golem" crystal - Guarantees at least 2 additional stats when evolving a pet. Blue - 3, purple - 4, red - 5. "Rainbow Spiral" crystal - Removes all gray stats from the random selection when evolving a pet. All crystals can be crafted in the Collections - Professional section. Have fun and good luck with your evolutions!