Unwelcome Flying Object

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#20: Octoling Uprising
Octo Valley missions
#B4: The Ravenous Octomaw!

Unwelcome Flying Object
~ Underpass Infiltration ~
Number 21
Area 4
Sheldon's Request
Items 1 scroll, 2 armor, 1 Bomb Rush, 1 Inkzooka
Music Inkstrike Shuffle
amiibo challenges Inkling BoyInkling Boy (recolor)Inkling Boy 2 Cash 1700
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Unwelcome Flying Object

Unwelcome Flying Object is the twenty-first mission available in singleplayer Octo Valley. It takes place in a modified version of Urchin Underpass, a multiplayer stage.

Octo Valley

Mission 21 can be found on the tower further away from the entry of Area 4. There are 2 ways of getting to Mission 21:

Option 1: Head to the tower on the right, there should be a geyser underneath the tower and an Inkrail when taken the Gusher. Activate it and fall down the hole. Agent 3 will be placed to where Mission 19 is located, and there is a Propeller-Lift to take. Use the Propeller-Lift and it'll take Agent 3 to a long cube platform with an Inkrail installed. Use the Inkrail and it'll take Agent 3 above Mission 21. Slip through the grate in squid form and Agent 3 will find the kettle to Mission 21.

Option 2: There is a shortcut that can be taken underneath Area #4, when close to Mission 16, perform a swimming squid jump to the long cube platform. Use the Inkrail on the cube and it'll place Agent 3 above mission 21. Slip through the grate in squid form and Agent 3 will find Mission 21.



Unwelcome Flying Object Stats
Area Enemies Armor Special Weapon Sunken Scroll
Beginning 1x Octocopter 3x Octodivers 1x Piece of Armor N/A N/A
Checkpoint 1 2x Octoballs
3x Octocopters
2x Octotroopers
1x Twintacle Octotrooper
N/A 1x Inkzooka N/A
Checkpoint 2 3x Octobombers
2x Octotroopers
2x Twintacle Octotroopers
N/A 1x Bomb Rush Yes
UFO Base 1x Octostriker
12x Octotroopers


Checkpoint 1

Starting off Mission 21, Agent 3 is put in Urchin Underpass. There are filled crates, one of the crates holds armor. There is an Octocopter hiding behind the crates. Not jumping off, there are Octotroopers to the left and right. Other routes are blocked off, so just continue on the mission.

Checkpoint 2

Off Course: If Agent 3 goes into the alley of the map, there are 2 large empty crates. Breaking them will reveal 2 Octoballs. There are also 2 small crates that hold a lot of Power Eggs.

On Course: An Octocopter is guarding the entry to the central part of the stage, but that's not it. There can 3 Octotroopers and 2 more Octocopters guarding the other side. There is an Inkzooka there to fight them off. After they are taken care of, head to the next checkpoint.

Checkpoint 3

There are now 2 Octotroopers guarding Agent 3's way through the grate, but there is a sponge that can be used for a shortcut or for hiding from the Octotroopers, but hiding from them won't be the exact answer since there is an Octostriker watching your every move. As you get past the 2x Octotroopers, now getting up to continue the mission, there are 2 more Octotroopers to fight. Once they've been taken care of, there is another sponge to use. A Bomb Rush Special is at the height of the sponge, which the Bomb Rush using Burst Bombs. Agent 3 will also face off 2 Octobombers, using the Bomb Rush will make it a small fight easy. Now onto the UFO Hideout!

UFO Hideout

Agent 3 is now against the Octostriker. The Octostriker hires Octotroopers to try to keep Agent 3 away. There is an Inkrail installed if Agent 3 doesn't want to go up above the small wall where the Octotroopers spawn. There is a way to make this fight extremely easy. If Agent 3 saves the Inkzooka from Checkpoint 2, The Inkzooka will do a ton of damage to the Octostriker. The same goes with the Bomb Rush special, but make sure it always hits the Octostriker. After the Octostriker's defeat, the Zapfish is in Agent 3's hands.


Sunken Scroll

What is this? It looks like the proprietor of that shoe shop! Could there have been an ancient creature that consumed prawns as food?! A terrifying thought indeed...

Location: At the Northeastern part of the map at the end of a side path. Go through the level normally until you reach the checkpoint just after the central area of the map. Take a right through the wired fence and continue down that path. Defeat the Octarian along it and grab the scroll.


Location of Armor 1:

Location of Armor 2:

Special Weapons

Location of Inkzooka:

Enemies and mechanics

Previously introduced


Agent 1's Quotes

Agent 1
Oh snippy snaps! It's an Octostriker!
Agent 1
Inkzooka! Let 'em have it!
Agent 1
Mari- I mean...Agent 2...is pretty darn good at impressions!
Agent 1
Launchpad located!

Agent 2's Quotes

Agent 2
Try ZL swimming to zip out of the way of the Inkstrikes!
Agent 2
Lookin' good, Agent 3!
Agent 2
Nice one, bucko!
Agent 2
Bomb Rush! Press Right Stick-then toss out as many bombs as you can!



  • The Italian name for this stage, like all UFO-related stages, references a science fiction movie - in this case, They Live.
  • Even after the changes made to Urchin Underpass in Version 2.0.0, the map's layout for the mission remained the same as the old version.

Names in other languages

Language Name Meaning
Japan Japanese ほんとUFO実在した!
~追跡! デカライン高架下~

Honto ni Yūfō wa Jitsuzai Shita!
Tsuiseki! Dekarain Kōkashita
UFOs are Realy Existent!:
Pursuit! Urchin Underpass
Canada French (NOA) - Passage Turbot -
Tenace, la menace!
- Urchin Underpass -
The menace is tenatious!
France French (NOE) - Passage Turbot -
Tenace, la menace !
- Urchin Underpass -
The menace is tenatious!
Germany German Unschönes Flugobjekt
über der Dekabahnstation
Unpleasant flying object
over Urchin Underpass
Italy Italian Essi imbrattano:
attacco alieno alla città!
They stain:
alien attack on the city!
Mexico Spanish (NOA) Objeto volador fastidioso
~ ¡Avistamiento en el parque! ~
Bothersome Flying Object
~ Sighting in the park! ~
Spain Spanish (NOE) ¡El ovni contraataca!
Amenaza bajo el viaducto
The UFO counterattacks!
Threat under the viaduct