Neptune (known as Neptune Emperor in Japan) is Makoto Shido's MTB. It is one of the six Idaten Bikes and was made by Takeshi Yamato. Takeshi designed it in such a way so that it would be able to ride on the water. It is the 3rd Idaten bike. No one can compete with Neptune in water as its power increases in water. The real power of Neptune is that Makoto and Neptune are one. While doing its special move in water, Makoto and Neptune are surrounded by water and sometimes take the form of a dolphin. It is also known as "Queen of Water".
Stats[]
| Emblem |   Gold |
|---|---|
| Wheel Base | 0.45m |
| Weight | 13.2 kg |
| Top Speed | 80 km/h |
| Mobility | 6 |
| Durability | 7 |
| Traction | 8 |
| Acceleration | 7 |
| General Purpose | 7 |
Gallery[]
Makoto looks on thanking Gabu for the path he made for Her,Koei and Arthur
Neptune (Ver. 1) as seen in the battle against Prince Ryota
Neptune (Ver. 2) as seen in the battle against Team Idaten