
Last updated: Nov/17/2011
Pokedoll - Japanese and American releases
ディアルガドール
Source: PokemonCenter.com, Pokemon Center Tokyo, fernchu and dionashi of pkmncollectors
I bought the first version of this doll before I started collecting Dialga, back when I was just collecting Pokedolls. Did it have a hand in starting the collection? It's possible!
You can click the names in the list below to see the tag for each version:
The original PokemonCenter.com version. I removed the hang tag from mine, but the tush tag says Pokemon USA, Inc. This looks a bit different from the others, but I don't know if that's due to design changes or the fact that this one just has a lot more wear.
2009 Nintendo World version. The tush tag says The Pokemon Company, International.
The Japanese version, which I don't think has changed. The tush tag says something in Japanese about the Pokemon Company.
The newest version, obtained from the vending kiosks in Seattle, WA in fall 2010. These have since been offered in the New York City Nintendo World store as well. The tush tag says The Pokemon Company, International, but also states the location of the office in Bellevue, WA.
DX Pokedoll
Source: Pokemon Center (Hamamatsuchou, Japan)
Before I went to Japan, I had all of the Dialga plush I'd ever seen. So imagine my surprise when I walked into the Pokemon Center and saw this one! He is much bigger (about 12" tall) than the standard Pokedoll.
There is also a very large (60 cm) Pokedoll for both Dialga and Palkia that I found out about on this trip as well, but as they were rare prizes I wasn't able to get them.
10th Movie Mascot Keychain Plush
ころっとマスコットぬいぐるみキーチェーン
Source: Yahoo! Japan
I have gone through a bit of history with this smallest of Dialga plush.
First, I saw them on eBay quite a bit and thought that it had to be a bootleg, since I never saw it from any other sources. The size and shape were too cute to resist, so I bought it and had it featured on this page for quite a while.
Then in early 2010, ambertdd of pkmncollectors found a set of official Dialga, Palkia, and Darkrai keychain plush, and showed me the auction! I now had an official version with the keychain and tush tag, and the latter reveals that he was actually made by Takara Tomy.
But, it still bugged me that he was missing the hang tag...so in mid 2011, I found yet another set in like-new condition, with both tags and a shiny new keychain attached. Here he is!
Sparkly Pokemon Center Plush
Source: Yahoo! Japan
I bought this on Yahoo! Japan thinking it was about the size of the Pokedolls if not smaller, but to my surprise it's about 12" tall! Those crazy Japanese sellers never putting any sizes in their descriptions..
This is actually a pretty rare plush, and I've only ever seen a few of them. It's from the initial release of Diamond and Pearl.

Dark Dialga (of Mystery Dungeon 2)
Source: eBay
I was really excited when I saw this plush on pokemon.co.jp because it has the colors of my hometown's college. I searched for it for a while before someone pointed me to an auction on eBay I'd overlooked. Thank you!
I've played through the game now and it's actually called Primal Dialga in the English version, but the tag says "Yami no Dialga" which translates just fine as Dark Dialga.
2009 Tomy Plush
Source: Sunyshore!
When I first saw preview pictures for this plush, I thought it was a reissue of the 2007 18" plush with new fabric, but it's actually a totally different plush - other than the fabric change (which is the same as the 24" Tomy below), it also is smaller, and the fins are just fabric instead of fabric with some stiff material (plastic?) inside.

18" Tomy Plush (Japan)
Source: eBay
I was thrilled to find this plush on eBay but wasn't sure I could believe the size, so I posted in pkmncollectors. Someone told me not only is it really that big, but that there's an even larger version! Of course, I had to get that one too, as soon as possible.
I got this one before the Jakks versions were released in the US, and they look so similar that I haven't actually bought the (much more common) Jakks version yet. I may pick one up just to be certain, though.

24" Pokemon Center Giant Tomy Plush
Source: Yahoo! Japan
Pokemon Center's new generation of giant plush aren't quite as detailed as the 2nd Gen plush, but they're still very nice. Mine is nicknamed Justice, after what I intended to call my Dialga in game but then cleared that save file before renaming it. It's still my in game Dialga to me though ^_^;
As soon as I found out about this one I had to have it. Someone pointed me to it on Toys N Joys (advising me not to buy there) for some images of its size. It's a testament to TNJ's prices that when I bought this on YJ with currency conversion, commission fees, and EMS shipping, it still didn't cost as much as the ones on there. These are pretty much all over the Dialga listings, so if you're into Dialga why not go and pick on up too?

Banpresto Plush (first release)
Source: I don't remember..maybe eBay?
Slightly scary and slightly chibi at the same time. Oh, Banpresto~

Banpresto Plush (second release)
Source: grrrowly of pkmncollectors
This is pretty similar to the other, but is a little more chibi. These two are kind of odd, I think.

Shimmery DX Banpresto Plush
Source: Yahoo! Japan
Apparently this plush comes in a non-shimmery version as well as this shiny one, but I'd passed it up since I considered it the same plush. I've since picked it up. ^_^

DX Banpresto Plush
Source: eBay
The non-shiny version of the one above. I think this version is a little rarer, and at least on mine the neck isn't floppy like it is on the shimmery version.