Edd the Duck was a game was released by Zeppelin Games on their full-price Impulze label and later re-released as a budget title by Zeppelin themselves. It was released in 1990 for the ZX Spectrum, Amstrad CPC and Commodore 64[ and in 1991 for the Amiga. More information on Wikipedia and Hall of Light.

A trainer offers one or more cheats like unlimited lives, invincibility, more ammo etc. Because this is done during runtime a trainer is not to be confused with a savegame editor.