Model Big Boy
Style Normal (CR1)
Normal (V2)
Armor (Arena)
Size* 8 x 5 x 4
Cube size Large
Classification Legal
Description Able to air-dash twice. Highly maneuverable in air. Can move far with a single jump.
Attack V2: 100%
Arena: 100%
Defense CR1: 9
V2: 9
Arena: 9
Endurance CR1: 6
V2: 6
Arena: 7
Speed CR1: 2
V2: 2
Arena: 3
Aerial CR1: 8
V2: 8
Arena: 7
Air Dash
Speed 136 hm/d
Length 67.5 in
Type Air Jump
Quantity 2
Type CR1: Attack
V2: Attack
Arena: Flak
Action CR1: Moderate Range Rolling Attack.
V2: Moderate Range Rolling Attack.
Arena: Flips up and lays down on the ground.
Speed 409-198 hm/s
Standard Damage CR1: 130
V2: 130
Arena: 161
Effect Opponent sent in low arc.
Ground Speed 80 hm/s
Jump Speed 220 hm/s
Jump Distance 82.5 in
*currently measured in inches

Gigantron (Dodecane in Japan) is a Big Boy robo that appears in Custom Robo (Nintendo 64), Custom Robo V2, and Custom Robo Arena. It is a Normal Style robo in the N64 titles and an Armor Style robo in Arena. It is used by Marv in all three games as well as Cheepers in Arena.

It has an upgraded version in Custom Robo GX known as Gigantron Turbo.

How to obtainEdit


Try not to get hit because of Gigantron's slow running speed; stay in the air to win.

Aerial Scythe
Creator: Mike2000
Robo Gigantron
Gun Needle Gun
Bomb Crescent Bomb C
Pod Wall Pod
Legs High Jump Legs
Works exceptionally well on smaller stages. Pressure with the Crescent Bomb and the gun while blocking with the pod. Also, try to drop the Wall Pod directly on your enemy to score high combos.



  • Gigantron's name roughly means "Giant Particle". This ties in with the Japanese naming convention of Big Boys (chemical compounds).
  • Dodecane (its Japanese name) is a Hydrocarbon. Its chemical make-up is C12H26, making it a "big" particle.
  • Gigantron / Dodecane heavily resembles Marv.