NES Game Genie.
The Pro Action Replay, everyone. I don’t know if this artwork was used outside the UK, I just remember “Techno Kid” here appearing in every bloody issue of every gaming magazine at the time.
If he looks familiar to you, it’s probably because you’ve seen this piece of Sonic the Hedgehog artwork before:
An advert for the Sega TV Tuner on the Game Gear! This was a pretty awesome piece of kit, making the Game Gear into a Colour Television!