Zest and quarter lime. Peel and mince garlic. Roughly chop peanuts.
In a small bowl, stir together lime juice, sugar, and salt and pepper until sugar and salt have mostly dissolved. Add 1/4 of the cabbage and half the lime zest; toss to combine.
Crema: In a separate small bowl, combine sour cream, a pinch of garlic, the rest of the lime zest, and salt and pepper. Add water 1 tsp at a time until mixture reaches a drizzling consistency.
Heat olive oil in a large pan over medium-high heat. Add pork and cook, breaking up meat into pieces, until browned. Season with salt and pepper. Add remaining cabbage and garlic, cook until cabbage is wilted and pork is cooked through.
Add cornstarch, water, chili sauce, and ponzu to pan. Cook, stirring, until sauce has thickened. Turn off heat.
Wrap tortillas in damp paper towels and microwave until warm and pliable, 30 seconds. Fill with pork mixture, cabbage slaw, Crema, and peanuts.