Way before the days of helping gamers ruin the online experience in Pokemon, Datel used to sell accessories and peripherals that actually didn't suck, and did more than just one thing. And were cheaper than the name brand stuff!
This is from a DVD that was included with one of their products, the Go-Net. This was a cheaper alternative to Sony's own network adapter for PS2. Also advertised are the Action Replay, A save exporter thing, and a keyboard. Pretty cool and innovative in those days.