[H3N51N]

I know it's probably already been asked a bunch of times but the search engine won't work on my phone so I have to ask here. I'm really confused about this subject. I first thought the Memory-Enhancing Adapter wasn't made as a toy due to me not finding it anywhere. Then I watch a video on the Gaia Memory Sound Capsule Complete Selection 2 Set (God, I hope that's right ^^; ) & I see an actual Adapter in the video connected to an Accel Memory with working sounds & everything. So I look online at various places & can't find anything else about it. Not just for buying purposes, I'm now legitimately questioning its existence. I keep reading what seems like misinformation since I'll find sellers telling me it doesn't exist, I'm looking at the wrong set, or that it does exist but it's not in the picture with the set when they say it does. What exactly is the deal with the item? Thanks in advanced!