Splatoon 2/Octo-Resort Spring

The Kettle for this mission is on a tower in the far right corner of Beaker's Depot. To get to it, after landing on the lower level, find a block with a Propeller, and use it to get to a higher platform. Swim up a wall and break a Taped Box to find a Ride Rail. Ride it, then switch to another rail, then ride through a Grate in squid form. Behind the Grate is the kettle.

Beginning Area
Take the ride rail to some Bounce Pads and get to the other side. Defeat the Octotrooper there, and get up with the Bounce Pad up front. Then defeat the two Shielded Octotroopers circling a stack of crates. Take the launchpad behind them and head to the next checkpoint.

Checkpoint 1
Ahead are two sets of moving walls and Bounce Pads, and an Octotrooper sits on the second one. Make your way over there, grab the key on the second wall, and take it to the vault to reveal the launchpad to the next checkpoint. There is also a Splat-Switch on the right side of the second moving wall, where activating it spawns three balloons.

Checkpoint 2
Ahead is a set of Bounce Pads leading to a path to the left, and a cycle of inkable blocks moving on the Bounce Pads to the right and dipping into the water at the end of the path. Navigate to the other side while keeping an eye on the Flooder and Octotrooper there. Continue to move along the path, down the inked slope, and onto the Bounce Pads. Defeat the Octotroopers bouncing on the Bounce Pads, and get on the platform on the right. Next is a huge area of Bounce Pads, cycling inkable blocks to the right, and a flooder and an Octotrooper on the platform on the other side. Navigate through all these, and get to the next checkpoint ahead.

Checkpoint 3
This checkpoint is more like a bonus room. Take the launchpad ahead to a high-up Bounce Pad. Move down the series of Bounce Pads slowly to maximize Power Eggs gained. When at the bottom, take the launchpad to head to the final checkpoint.

Final Checkpoint
Ahead is a large area of Bounce Pads with an uninkable wall sweeping across. A block is suspended to the wall, and an Octotrooper sits on top. Get to the platform on the other side, where another Octotrooper awaits. Climb up with the Bounce Pads ahead. Next are another set of Bounce Pads and an uninkable moving wall. On the wall are two blocks on the sides, three Octotroopers on top, and an Octosniper behind them all. After making it to the other side, get on the Bounce Pads, ink the wall ahead, and climb up it to get to the Zapfish.