DenLiner

The DenLiner (デンライナー) is Den-O's transportation system, a 'Shinkansen' (bullet train) mainly used for traveling to other times and launching attacks against Gigadeaths. The DenLiner arrives when a person holding a Rider Pass touches a door while the hour, minute and second of time are the same. It is able to travel to different times when a Rider Pass, along with a Rider Ticket that contains the date in which an Imagin has traveled to, is inserted into the DenBird, while docked in the DenLiner. The date then becomes DenLiner's new destination in time.

The DenLiner has multiple forms, split throughout eight cars. When not using a certain form, DenLiner's eight cars are linked up, forming one large train. These railroad cars only disconnect and change form when Den-O is in the corresponding form. Form-specific cars can also link up with other cars in various orders to provide additional weaponry when fighting Gigandeaths. Furthermore, the DenLiner can link up with the ZeroLiner for more power. When Den-O enters Climax Form, DenLiner is affected by the power surge and enters Climax Mode (クライマックスモード), turning a golden color with an intense fiery aura around it.

The DenLiner also has various non-combative cars that separate from the Gouka during battle and serve as settings for the television series and movies. These include the dining car where most of the series takes place, a bath car used several times late in the series, and the sleeping car where the group meets the Swan Imagin Sieg.

Gouka
DenLiner Gouka (デンライナー ゴウカ（業火）) is based on the legend of Momotarō (the legend from whom Momotaros is based and is activated when Den-O is in Sword Form. This train is composed of cars one through four, each with a unique attack that relates to a component of the legend. When attacking, the train turns sideways and each of the four compartments open up, each revealing a weapon.
 * The first car is the GouCannon (ゴウカノン). It represents Momotarō himself and is able to fire lasers.
 * The second car is the Doggy Launcher (ドギーランチャー). It represents the dog Momotarō befriends and is able to fire rockets named Doggy Bark (ドギーバーク).
 * The third car is the Monkey Bomber (モンキーボマー). It represents the monkey Momotarō met and is able to launch bombs named Monkey Bomb (モンキーボム).
 * The fourth car containts the Birdie Missile (バーディーミサイル) that represents the pheasant that Momotarō met. It is a miniature bird with blade-like wings.

Isurugi
DenLiner Isurugi (デンライナー イスルギ（石動）) is a turtle-style train that is activated when Den-O is in Rod Form. Composed of car five, the back of the car is able to open to release a turtle-like machine named Radome (レドーム) that Den-O uses as a hovercraft to travel on water. Isurugi is also able to fire lasers from its front. Isurugi can also combine with Gouka, but instead of staying in the back, it attaches to the front. In addition to Gouka's usual weaponry, Radome sits on top Isurugi, extending two blade-like lasers when attacking, chopping a Gigandeath in half.

Rekkou
DenLiner Rekkou (デンライナー レッコウ（裂光）) is an ax-style train that is activated when Den-O is in Ax Form. Composed of car six, five axes called the Side Ax (サイドアックス) appear from each side of the train along with one large ax called the Front Ax (フロントアックス) on the head. Rekkou is a primarily close range offensive train. The five axes on the sides can strike through the Gigandeath with the whole train facing upward, chopping through the enemy multiple times, or hold the monster at bay to deliver a piledriver attack. Its most effective attack is when Rekkou's large ax on the front expands in length and Rekkou passes under the Gigandeath at full speed, slicing the target in half. It is also able to combine with Gouka, attaching to the front, which allows their weaponry to be combined. When combined with Ikazuchi, its axes on the side can create crescent waves shot at the Gigandeath.

Ikazuchi
DenLiner Ikazuchi (デンライナー イカヅチ（電雷）) is a dragon-style train that is activated when Den-O is in Gun Form. Composed of cars seven and eight, the upper half is able to open up to reveal a dragon head while the rear half is able to reveal a dragon tail. The dragon's head is able to launch energy blasts and bite into Gigandeaths to fling them away. It is able to combine with all the other trains, forming a new DenLiner that contains eight cars, all in their respective forms. Ikazuchi's first car with the dragon head is in front, followed by Rekkou, Isurugi, Gouka. The end is the second part of the Ikazuchi, with the dragon tail (the Kanji names of these cars spell out "Lightning Speed" (電光石火)). Unlike other formations, Den-O stays atop of the dragon head with the Machine DenBird when fighting (in other formations, Den-O operates from within Gouka), performing a conjunction attack with a variation of his Wild Shot and a powerful bursting stream of energy from Ikazuchi's cannon.