Jimmy's toothbrush holder/device is the sub from Yellow Submarine.
The character name Sheen Estevez comes from Martin SheenMartin Sheen, whose birth name is Ramon Estevez.
The film was originally going to be a pilot, for a TV series. But when the Paramount executives were shown very early footage, and early design plans for it, they were so impressed by it that they decided to fund it for cinema exhibition.
