The Cosmic Express
The Cosmic Express (Japanese: うちゅうれっしゃ, Space Train) is a luxury train on Planet Bunnera which was created by the Monstar Modo and his son Junior. The front of the ship seems to be based on a bullet train while the passenger cars are styled after carrots.
Design Spec 1
Really super long
Really super heavy
"...Oh right! The engine... Engine... I should've thought of that before. Hm..." -Junior
The Cosmic Express was apparently never given an engine by Junior, due to this Modo must use his powerful fire breath to propel the train forward.
Design Spec 2
The Cosmic Express was created using the same materials found in Bunnera's castle, these unique materials create an artificial field of gravity which allows the passengers and the crew to walk around freely within the train.