This is a sub-page of Splatoon 2/Unused & Unobtainable Gear.
Headgear#
CAP015#
The Legendary Cap from Splatoon, directly ported from it. The models can be found in the base 1.0.0 files, and it has a placeholder gear entry, beyond still being apart of the Cuttlegear brand. This gear is a special case in that it actually has a name entry in the message file, which means it may have been shifted over to a Salmon Run reward fairly late in development.
It seems they may have still considered bringing it back without Grizzco branding, as a new unisex model was added in 2.1.0. It's mostly similar to the final Cap of Legend, but the texturing is completely different. The gear entry was updated to support more hairstyles, and to use the new unisex model.
CAP016#
The CoroCoro Cap from Splatoon, with no color changing. The model can be found in the base 1.0.0 files, but it has no gear entry in the database.
CAP017#
A backwards version of the Streetstyle Cap. The model can be found in the base 1.0.0 files, and it has a placeholder gear entry that was removed in 3.0.0.
CAP028#
A completely generic color-changing cap that's possibly a template model for this type of headgear can be found in 3.0.0. It has no gear entry.
NCP007#
A completely uniquely-textured beanie. The model can be found in the base 1.0.0 files, and it has a placeholder gear entry that was removed in 3.0.0.
HBD006#
A basic bandana, which uses the same base model as FishFry Biscuit Bandana and Black FishFry Bandana. The model can be found in 1.2.0, and it has a work-in-progress gear entry, with a placeholder price, the brand being Tentatek, and the ability being Tenacity. The gear entry was removed in 3.0.0.
MSN109#
An infamous mask modeled after the final boss of Octo Expansion, NILS. The model is first found in 3.0.0 and has a gear entry that was removed in 3.1.0. The gear entry indicates that it was intended to be another piece of unlockable reward gear in Octo Expansion. Notably, the entry for this was replaced with the Teddy Band in Splatoon 3, marking the only time throughout the whole series where a gear piece's ID has been replaced.
TST000#
A blue test cap helpfully labeled with "TEST". The model can be found in the base 1.0.0 files, and it has a placeholder gear entry that was removed in 4.0.0.
TST001#
A pink test cap with "TEST2" written on it. The model can be found in the base 1.0.0 files, and it has a placeholder gear entry that was removed in 4.0.0.
Clothing#
TES100#
A test tee with a graphic of a shoe and "TEST" written on it. The model can be found in the base 1.0.0 files, and it has a placeholder gear entry that was removed in 4.0.0.
TES101#
A test tee with a render of an Inkling girl on it. The model can be found in the base 1.0.0 files, but it has no gear entry in any version.
VST006#
A unique red and blue vest. The model can be found in the base 1.0.0 files, and it has a placeholder gear entry that was removed in 3.0.0.
TRC000#
An unused piece of clothing gear found in the base 1.0.0 files that was most likely a Tower Records collaboration based around the real life Rock vs. Pop shirts made. It calls for a model named Test_Clt_towerRock that doesn't exist in any retail build. The gear entry is completely placeholder and was removed in 4.0.0.
TRC001#
An unused piece of clothing gear found in the base 1.0.0 files that was most likely a Tower Records collaboration based around the real life Rock vs. Pop shirts made. It calls for a model named Test_Clt_towerPop that doesn't exist in any retail build. The gear entry is completely placeholder and was removed in 4.0.0.
TRC002#
An unused piece of clothing gear that was most likely a Tower Records collaboration. It calls for a model named Test_Clt_TRC002 that doesn't exist in any retail build. The gear entry is completely placeholder and was added in 3.1.0, but removed in 4.0.0.
TRC003#
An unused piece of clothing gear that was most likely a Tower Records collaboration. It calls for a model named Test_Clt_TRC003 that doesn't exist in any retail build. The gear entry is completely placeholder and was added in 3.1.0, but removed in 4.0.0.
TRC004#
An unused piece of clothing gear that was most likely a Tower Records collaboration. It calls for a model named Test_Clt_TRC004 that doesn't exist in any retail build. The gear entry is completely placeholder and was added in 3.1.0, but removed in 4.0.0.
TRC005#
An unused piece of clothing gear that was most likely a Tower Records collaboration. It calls for a model named Test_Clt_TRC005 that doesn't exist in any retail build. The gear entry is completely placeholder and was added in 3.1.0, but removed in 4.0.0.
NIK000#
An unused piece of clothing gear found in 3.0.0 that was most likely a Nike collaboration, since it shares the name with unused Nike shoes gear that were made for the Japanese Newest vs. Most Popular Splatfest. It calls for a model named Test_Clt_NIK000 that doesn't exist in any retail build. This was likely a tee seen in a promotional render for the Splatfest, like the shoes.
NIK001#
An unused piece of clothing gear found in 3.0.0 that was most likely a Nike collaboration, since it shares the name with unused Nike shoes gear that were made for the Japanese Newest vs. Most Popular Splatfest. It calls for a model named Test_Clt_NIK001 that doesn't exist in any retail build. This was likely a tee seen in a promotional render for the Splatfest, like the shoes.
Shoes#
COP100#
Orange test arrows found in the base 1.0.0 files that acted as a placeholder for the intended first Salmon Run shoes gear reward, but it was scrapped in favor of the Angry Rain Boots (COP101). The gear entry is completely placeholder and was removed in 4.0.0.
NIK000#
Nike collaboration shoes made for the Japanese Newest vs. Most Popular Splatfest added in 3.0.0. They're a replication of the real life Nike Air Max 95s that were only used in a promotional render alongside an unobtainable shirt, while players got the Sea Slug Volt 95s, which are meant to be reminiscent of the actual shoes without using the Nike branding. The gear entry is placeholder, and the brand is set to NoBrand.
NIK001#
Nike collaboration shoes made for the Japanese Newest vs. Most Popular Splatfest added in 3.0.0. They're a replication of the real life Nike Air Max 270s that were only used in a promotional render alongside an unobtainable shirt, while players got the Sesame Salt 270s, which are meant to be reminiscent of the actual shoes without using the Nike branding. The gear entry is placeholder, and the brand is set to NoBrand.
TST000#
Blue test hi-horses with the word "TEST" helpfully written on the back found in the base 1.0.0 files. The gear entry is completely placeholder and was removed in 4.0.0.
TST001#
Pink test hi-horses with "TEST 2" written on the back found in the base 1.0.0 files. The gear entry is completely placeholder and was removed in 4.0.0.