When the Psyma commence their attack in 1999, months before the Grand Cross is to occur, the Tatsumi siblings find themselves recruited by their estranged father to fight the demons as the GoGoFive team.

The Tatsumi Family (巽家, Tatsumi-ke) is from a long line of "machi-bikeshi" (firefighters of Edo, the capital of the Tokugawa Shogunate) and they are portrayed as providing emergency and rescue services in Tokyo.

The Five Liner (ファイブライナー, Faibu Rainā) is a group of five giant train cars that were designed to carry the 99 Machines into battle.

The left shoulder cannon fires Liner Homing (ライナーホーミング, Rainā Hōmingu) missiles, and the right cannon fires Liner Gatling (ライナーガトリング, Rainā Gatoringu) bullets) are the only weapons strong enough to pierce the hardened armor of the Golem Psyma Beasts.

In the finale, the Grand Liner had his right arm torn apart, thus rendering it useless in the battle against the Grandiene-possessed Zylpheeza and Salamandes.

The Max Liner (マックスライナー, Makkusu Rainā), modelled after a bullet train, was created by Mondo Tatsumi with some assistance from Kyouko.

), the Max Shuttle (マックスシャトル, Makkusu Shatoru) can haul the Five Liner that is loaded with the Mars Machines into space.

is given after collecting enough solar energy from space, the Max Liner's front wheel assemblies become the arms, the rear section becomes the legs, the nose becomes the back (revealing the head), Liner Boy (ライナーボーイ, Rainā Bōi), whilst the fender becomes the Blaster Shield (ブラスターシールド, Burasutā Shīrudo) weapon, and the solar-panelled side becomes the chest.

Liner Boy forms Max Victory Robo's helmet, breastplate, pauldrons, gauntlets, fauld, and greaves.

Another ability the Max Victory Robo has is an array of solar panels, which enables it to absorb power from explosions.

In the finale, the Max Victory Robo was blown to pieces when Matoi moved it in the way of a blast shot by Zylpheeza and Salamandes to protect a flammable building, in which Daimon and Matsuri just escaped from while rescuing a group of children inside.

Unlike the other mecha, the Mars Machines have different technology that allows them to function without the aid of solar energy.

In the GoGoFive vs. Gingaman special, the Victory Mars briefly gained the power of the Gingaman's Lights of Ginga's Armor and became Super Armor Shine Victory Mars (超装光ビクトリーマーズ, Chōsōkō Bikutorī Māzu), wielding both the Jet Lance and the Super Rescue Silver Armor Sword (超救急銀鎧剣, Chō Kyūkyū Gingaiken) in its enhanced mode, and using an attack called the Galaxy Double Flare (銀河ダブルフレア, Ginga Daburu Furea).

It once used Victory Robo's Braver Sword for an attack called Mars Prominence (マーズプロミネンス, Māzu Purominensu).

In the finale, the Victory Mars had its left arm torn apart, thus rendering it useless in the battle against the Grandiene-possessed Zylpheeza and Salamandes.

GoGoFive used this robot with the knowledge that, although they had supposedly lost their father, their mother is still alive, and they used this mental energy to power up the sword which allowed them to emerge victorious over Grandiene.

They have their headquarters, the Demon Palace Psyma Paradico (魔宮サイマパラディコ, Makyū Saima Paradiko), at the North Pole.