A version for the Game.com was cancelled.

A version for the PlayStation 2 was planned, but cancelled.

The new version was cancelled after fourteen episodes.

A European version was announced but cancelled a few months before release, allegedly due to problems with the conversion tools.

It is assumed that this version of the game had been cancelled to prevent controversy.

This version was not very popular and was cancelled after 13 weeks.

The revived version failed to establish wide distribution or much of an audience and was cancelled after one season.

An Android version was originally planned, but was eventually cancelled.

A version for the Game Boy Advance was planned, but later cancelled.

It was also supposed to be released for the Xbox console, but that version was cancelled.