Trivia: Custom Robo
- Marth Debuted in Smash Bros.: Super Smash Bros. Melee featured three trophies based on Robos from Custom Robo V2, which never saw release outside of Japan. The series wouldn't make landfall in the west until Battle Revolution, three years later.
- Recycled Script: Arena's plot and and overworld graphics are recycled from a canceled GBA Custom Robo game, hence their primitiveness.
- Sequel First: The first game in the series to be released in the US was Battle Revolution, which was for the GameCube.