According to The Art of Splatoon 2, The Octo Oven was originally just a bread-baking machine created by an Octarian that knew about bakeries in Inkopolis. The bread had good reputation and in order to raise the rate, the Oven was upgraded to bake more bread at once. Unfortunately the bakery's owner was seriously injured when the bread ejected itself when done. After this, the Octo Oven was made into a one of the new Octo Bosses to be battled by Agent 4 in Octo Canyon.
Description
The Octo Oven is a large oven with several Octarians inside of it. It also has a single glowing eye to watch Agent 4, along with wheels similar to those of a Flooder. In Phase 2, the eye is replaced with a pair of vent hoods that resemble eyes along with an even bigger orange eye above it. There are also has three vents coming out from the three back sides. It should also be noted that there are stickers on it that appear to be logos for an Octarian bakery. On top of it is a hole where its tentacle can pop out of.
The Octo Oven is the first Octo Boss that is fought in the Octo Canyon (mode). It will slowly surface from a large puddle of ink, starting the battle. It will attemp to hit Agent 4 with a one of the "loaves" until it gets fed up and shoots all of them out, this is 4's chance to climb up and splatter the tentacle. After this, the giant oven will remove several panels revealing an even bigger eye, three vents, and another pair of purple eyes. It will also shoot several "churros" from its top, and then continue its regular attack. In the final phase, it will grant the bread armor and will bring out a glazing machine to attack 4. Once defeated, the "bread" will shoot out burnt before exploding.
The Octo Oven returns in the Octo Expansion, known as the Octo Oven XXL, where it has been Sanitized and situated in Toastmaster Station. Its battle with Agent 8 is very similar to its last one with 4, where it constantly tries to hit its foe with the "bread". However, they are not alone, now there are several Octotroopers guarding the weak spot. Soon the Octotroopers are replaced with Octobombers, then later Octosnipers. After the tentacle has been splatterized thrice, the "bread" will burn and the Oven will once again blow up.
Trivia
The Octo Oven is the only Octo Boss that was not originally designed as a weapon.
The Bread's attack pattern is similar to that of the Ink Pistons.
