This article is filled with complete falsities. edit
"If a player wanted to, the idea was that they could put their SD Robot Wars cart into the A slot, and then put, for example, the Sailor Moon cart into slot B and play a game that used both characters and a new game would be made from the two carts. If this worked with all games released is uncertain at this time."
Is completely untrue. Mathew Kendora of Snes9x and Nach of ZSNES reverse engineered this in 2003. Their documents and software completely certain which games are compatible with which others. And no, it does not work with all games. Every game has a marker in it's header for what it's compatible with.
- Also every game purchased has a picture in the lower left corner of the box showing either 1 or 2 cartridges indicating whether the game is linkable or not. - Dizrythmia
"The accessory was not released widely, and bsnes is the only emulator that supports this technology at this time." Is also completely untrue. bsnes added support for this just a month or two ago. ZSNES has support for this since 2003. Snes9x also had support for it, but the code was never enabled in the emulator until recently as the developers back then could not agree on a loading mechanism.
- I have completed an almost total rewrite with factual information using information I have found out myself, & a translation of the Japanese Sufami article on Wikipedia. I have recently acquired a Sufami Turbo & have a keen interest in it. If I don't know something it's not going to be added. No making up facts - Dizrythmia