Corrected entry: How can Pluto have a mother if he is a clone?
Corrected entry: The story line is based around mobsters wanting to buy Nash's club to turn it into a casino, and then trying to pressure him when he won't sell. At the end the boss of the mobsters turns out to be a clone of Nash, complete even with his memory. If this is the case why buy the club? Just kill Nash and have the clone take over running the place.
Correction: The mobsters would also have to eliminate Nash's android, all of his employees, and anyone he does business with to run the club, just in case someone notices that the clone is acting contrary to Nash's wishes or interests. Not only that, but even for organized crime killing is a last resort (murder attracts much more attention from the authorities than extortion and there's always the chance an underling will botch things). It's easier just to pressure Nash into selling the club, making everything legitimate and risking far less jail time in case the scheme falls apart.
Correction: Rex Crater is a clone of Pluto Nash. Pluto himself is an "original".