Kamen Rider Ghost DX Proto MegaUloader
 

A 6000-piece run of the transformation device used by Superior Ganma. Includes 2 Eyecons, one of which has Ganma sounds.

http://p-bandai.jp/item/item-1000102862/

WOW! A hunk of uncolored, unmovable plastic with even less playability and sounds than the original! Truly worth the $60+ price.

Maybe so, but each of the Eyecons themselves would probably go for about Boost prices at retail, let alone at PB prices. The price doesn't really seem that high taking that into consideration, though it's fairly expensive either way.

Also at the current rate it's just like, $57ish USD but regardless.

Kamen Rider Ghost says
 

There's no on switch where it should be

That is... A great point. Do all of the transformation sounds come from the Eyecon themselves? Weird.

In the show Igor doesn't have to do anything to the ProtoMegaUruoda to Ganma Change, the sound just plays when he puts in the Eyecons. So that's screen-accurate. I'm guessing either yeah all the sounds are in the Eyecon, or there's a single button in the brace that plays the Ghost jingle when an Eyecon is inserted.

Kamen Rider Ghost says
 

Also, how do the Ganma eyecons fit in the Megauloader? There is no room for the bottom part

I doubt they can fit in Necrom's, but this one is different. It's a remold, they probably reworked the entire slot for the Eyecons.

No, he means the switch to turn on the Uloader's electronics is missing from where it is on the original toy. Which makes me think the brace itself might not have any sounds in it all all, and they're all provided by the Eyes.

Ohhh. Yeah I see now. That probably is the case, then.