Question: what are the adventure sync rewards?
Answer: 5km: 20 Poke Balls.
25km: 10 Great Balls + 500 Stardust + 1 Rare Candy or 1 5km Egg.
50km: 5 Ultra Balls + 1,000 Stardust + 5 Rare Candy, 5 Silver Pinap Berries, 5km egg or a 10km egg.
100km: 16,000 Stardust.