Dexter's Laboratory - Mandark's Lab [SLUS-01421] ROM Download for Playstation (PSX). Dexter's Laboratory - Mandark's Lab [SLUS-01421] game is available to play online and download only on Roms Games. Dexter's Laboratory - Mandark's Lab [SLUS-01421] ROM for Playstation download requires an emulator to play the game offline. This Game is English (USA) Version and is the highest quality available.