Fun fact: CPI has quite a bit of unused content! You can find bits of it by exploring the different versions of CPI! Things I mentioned here I have found in the files myself, there could be many more things I don't know about. I know of others things that are unused, but they aren't as interesting.

Most of the unused content consists of unreleased clothing items. Many of these clothing items were deleted in version 1.9. There are also unused blueprint icons and descriptions for uncustomizable items such as the beta hat that are still in the files. There's also a description for the fishing pole [a gear you can't obtain normally in the game].

Other unused content include early textures for Dot, Rory, and Cadence, all of which were deleted in the next version. There are other unused textures/sprites, most of them aren't of note except for one texture that is a bad quality render of a bad quality concept penguin wearing a strangely high quality jacket that still exists in the files to this day. I assume it was used a custom clothes placeholder texture.

Moving on, I think what has to be the weirdest part of the unreleased content are the proxy models. Proxy models are simplified versions of complex models so that they are easier to animate. Thing is CPI models are not complex at all. I can only assume they were early test models used in the game before the real ones were added. Only 3 of these exist that I know of.

BUT WAIT THERE'S MORE! What has to be the MOST interesting part of CPI's unused content without a doubt is... the unreleased room!
This room likely existed in the files since Island Central was released, I can infer that because this room was called "TownInterior", "Town" being the ingame name for Island Central. Island Central has 2 interior rooms, Cadence's studio and and the hidden underground cafe, however, this was not originally planned to be the case. This "towninterior" room had no textures made for it, only having some vertex color. The model includes jail cells, a table and leather chairs, with tv screens mounted to the wall. You know what that's very reminiscent of? EPF headquarters from the original Club Penguin!! Concept art tells us this likely would have been the city hall.
Unfortunately, this "Towninterior" model was deleted from the files forever in version 1.9. It's likely that the CPI team scrapped the city hall all together or planned on remaking the room but were never able to. CPI's team had also scrapped Dot's clothing store [which was going to be where Cadence's studio is]...

I hope you found this interesting, perhaps later I'll link screenshots to the various things I mentioned.

They're not. The penguin's bones are actually just sticking out at odd angles, I didn't feel like fixing it. The zig-zag look is because of relationship lines [dotted lines that show the bones' parents].

@Jasper7438 Interesting, is the bones of the penguin model zigzagged? As I've seen the video, I'm wondering if the model's bones are like that.

@Jasper7438 By the way, I've got your message and wanted to reply back but your PMs is disabled...

Perhaps? I've never played AJ, so I wouldn't know. I had to hardcore internet search for a solution to my unrigged clothes issue and it ended being a kind of mishmash of 2 two different tutorials I found. I finally figured it out and tried to teach it to my fellows but they never seemed to quite get it for some reason...
I recorded how I fix the unrigged clothes issue in Blender 2.79. I would do it in 2.8 but I think the steps are bit different.
Link to the Blender test video

@Jasper7438 About how applying clothing on the models work, I wonder if it's the same thing for AJ: Play Wild?

Looks like nothing has been uploaded here for a while, so I suppose I'll pick up the slack.
I have just submitted Scorn [the dragon king], and I plan to submit the player penguin and the remaining npcs [some with early/event specific textures].
I might upload penguin clothes, although they won't be rigged. The clothes system in CPI is weird... I think the clothes just take on the vertex groups of the player body parts they replace, which works pretty well after testing in Blender.
Both the player model and most of the clothes use a rgb textures in place of penguin color/fabrics.

Submitted DJ Cadence, Rookie and Bongo Drums. Yes.

I've just figured it out. Trying to rip the models now.

The game runs in Unity, so you can use Asset Studio to extract it.

Guys the game will be re uploaded like club penguin rewritten.It will be called Club Penguin Island Continued, it will be released somewhere in February.

@Notbeen
Are you able to access it offline?

I have the .exe. Both installer and game.

And the game shut down yesterday. I guess it's too late. R.I.P CP again (unless someone still has the .exe file and accesses offline mode.)

WE GOTTA WORK FAST IF WE WANT THOSE SWEET SWEET HIGH REZ PENGUIN MODELS!

Club Penguin Island is closing at the end of the year

Okay, this game is closing down now possibly of Rewritten popularity.

Am I the only one who realized that Disney was an idiot on their part? Yeah, I know I don't play Club Penguin, but there's another virtual world aimed for kids called Animal Jam which they had a mobile version of their game titled: Animal Jam Play Wild and the PC version wasn't shut down. But that's because the game is eight years old since it was opened in 2010 not somewhere in the 2000s.

My childhood... ;.;

I'll be ripping some models for Club Penguin Island as well. So watch out for those.

sweet