Quick Answer
Talk to the Whale and join Ark. Sandbag the auto shop and the grocery store in Coinrust. Then go straight to Buster HQ, even though the objectives screen does not list it.
Chapter 6: what do you do after meeting the Whale?
Join Ark, stop the flooding in Coinrust, and continue to Buster HQ.
Join Ark
Speak with the Whale. You can accept his offer and join Ark.
Sandbag Coinrust
Shore up the flooding in Coinrust. Set sandbags at the auto shop and at the grocery store.
Go to Buster HQ
The flooding task never appears on the objectives screen. Once the sandbags are set, travel to Buster HQ to continue.
Why are you stuck after the sandbags?
Nothing else in Coinrust moves the story forward. Talking to the Whale again or checking your home does not help.
Buster HQ is the next stop. The Neo Junk City final chapter walkthrough covers Set and the drones there.
Before the final chapter, finish the four Ark quests. The Neo Junk City Ark quests guide lists them, and the Neo Junk City walkthrough links every chapter.
Reported by other guides, not verified
- Players say the start of Chapter 6, before you enter the restaurant, is the best time to finish side quests and race gold medals.
- Declining the Whale's Ark offer is reported to be the last chance before the overworld changes.
FAQ
Joining Ark through the Whale starts the Coinrust flooding task.
Set sandbags at the Coinrust auto shop and the grocery store.
Go to Buster HQ. The objectives screen does not show this step.