Wild Berry Cookie is one of those characters that feels like a reward for putting in the effort, and I love how 'Cookie Run: Kingdom' makes unlocking him feel like an adventure. First, you gotta progress through the story mode—specifically, you’ll find him in Episode 10 of the Dark Mode stages. It’s not a walk in the park, though; your team needs to be pretty solid to clear those levels. I remember grinding for days to level up my cookies and toppings before I could finally take on those stages.
Once you beat Episode 10-31, Wild Berry Cookie’s soulstones start dropping. You’ll need 20 to summon him, which might take a while if RNG isn’t on your side. I swapped some mileage points for extra soulstones when I got impatient, but if you’re patient, just keep replaying the stage. The cool thing is, even the grind feels worth it because Wild Berry’s charge skill is so fun to use—watching him bulldoze through enemies never gets old.