The Kettle for this mission is on a platform to the right of Suction-Cup Lookout. To get to it, swim up the platform to the right of the Boss Kettle, and in Squid Form, Use the dash pad, and the kettle is on the platform you land on.
Mission Briefing
Gameplay
Map
Mission Stats Chart
Mechanics
Walkthrough
Beginning
The player spawns on top of a walkway leading left, and a pit filled with Octarian ink and three Shielded Twintacle Octotrooper bellow them. Proceeding forward will cause an Industrial Squee-G to break through a set of crates and gives the player an introduction on how they work: they will move to clean up all ink in an area, and can splat enemies. The player is suggested to simply proceed forward via the walkway, but should the player fall into the pit, they can leave via a gusher back to the walkway, or an inkable wall in the crevice housing the Industrial Squee-G the player can climb up. The end of the island has a Ride rail that brings the player to the next checkpoint.
Collectibles
Sunken Scroll
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Many travelers find themselves in Inkopolis Square at some point in their journey. Youth from far-flung seas gather in this colorful hub of comings, goings, meetings, and farewells.
Location:
After Checkpoint 3, get past the giant Squee-G, and once you get onto the T-shaped platform with the launchpad, look for an opening on your right. Jump down through the opening and go left to find the crate with the scroll.
Sardinium
Location:
After Checkpoint 5, get onto the platform with the key to open the door of the cage of the Squee-G, and ride the inkrail back. Jump at the end of the rail onto the glass platform that holds the Sardinium.
Armor
Back-Alley Cleanup has 4 pieces of armor to collect.