Question: pokemon ultra sun and ultra moon how to get ash greninja?
Answer: To unlock Ash-Greninja, you have to complete the main story of the demo. Here's a complete walkthrough of what's required. After the opening cutscene where your receive your Ash-Greninja, leave City Hall and fight the Team Skull Grunts outside (your Water Shuriken should make light work of the rival Yungoos).