Shooting Range
The name(s) presented could be conjectural.
The Testing Area is a location in Booyah Base through Ammo Knights that Inklings can use to test weapons. Players can access this area by pressing 
from the Equipment screen or from pressing (+) at Ammo Knights.
Area
The Testing Area is made up of two target ranges: one immediately in front of the player from the start, and one up the ramp to their left. To the player's right is a door back into Ammo Knights, though it cannot be interacted with and is just for show. Next to the door are some boxes stacked up, with an unknown weapon leaning against them.
The first area has three squid-shaped test dummies. Damaging them causes the amount of damage done to appear above them. They are destroyed after taking 100 points of damage, but if they take damage without being destroyed, they will heal in the same amount of time it takes players to heal in a multiplayer battle. The first area also features a series of dashed white lines on the ground to help players gauge the range of their weapons, as well as four grates on the walls that can be climbed to to test Chargers or other weapons. They also help the player determine their weapon's ability to Ink vertical surfaces quickly, as some are better at it than others.
The second area features nine dummies. Three of them are regular enemies, three have the Defense Up ability as indicated on their front, and the back three are larger and much more durable, taking 500 points of damage to destroy. On the right wall is a basketball hoop.
All ground and walls are ink-able.
Background
The Testing Area is in the middle of Inkopolis, surrounded by concrete city buildings and structures. During a Splatfest, the Squid Sisters' song can be heard in the distance.
There is a non-climbable ledge surrounding the area preventing players from climbing out of it, though by placing a Squid Beakon and Super Jumping to it, the surrounding area can be briefly seen.
Much of the Testing Area is covered in graffiti and advertisements, as with most of the Splatoon world. However, unlike multiplayer matches or at Booyah Base, there are no Miiverse graffiti posts.
Easter Egg
The Testing Area features an easter egg: if the player tosses a Splat Bomb through the basketball hoop in the second area, the hoop will produce a sparkly green effect and the player's Inkling will say a celebration. Splat Bombs are the only Sub Weapon that can be used for this, as they are the only ones that that will not simply stick to the hoop or explode against it.
Gallery
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A screenshot of a player in the Testing Area.
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The Testing Area during Splatfest.
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The weapons testing area.
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An Inkling firing a Heavy Splatling at the Shooting Range.
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An Inkling standing on one of the grates in the Shooting Range.
