Crash Bandicoot/Headscratchers

In the first Crash Bandicoot, you rescue Tawna Bandicoot. I don't ever recall seeing her in another game since. What happened to her?
- IIRC, Tawna wasn't quite PC enough for a series targetted for kids, so she got shafted in Coco's favor in the second game. As far as I know, she did reappear in Crash Boom Bang on DS and some background art in Twinsanity.
  - Tawna was going to make a physical appearance in Twinsanity where she would have been having a romantic dinner with Dingodile until his shack is smashed by that snowball.
  - And as a framed picture in some of the Crash games.
    - I forget where it's said, but she ends up dumping Crash for Pinstripe. Remember that mouse/gangster thing? Yeah. Him.
- That's only canon in Japan, but it's been accepted into international Fanon.
Why doesn't N.Tropy go back in time to prevent Cortex and Brio from creating Crash?
- Because creating Crash causes Cortex to fail to lose the gems and the crystals. However, Cortex's bumbling defeats to Crash lead to Uka-Uka being set free. Going and stopping Crash from being made causes a paradox that stops Uka-Uka from being freed, stopping them from enlisting N. Tropy, and preventing them from going back in time in the first place.
- Actually, According to the Manual (Or the Naughty Dog website I'm not sure anymore.) N. Tropy causes time paradox for shits and giggles. So chances are he has killed Crash. He just chooses not to stay in a time period where he killed Crash. And now that I think about it…
- It's said in one of the manuals for the PlayStation 2 Crash Bandicoot: The Wrath of Cortex, which due to the Broken Base is Fanon Discontinuity for some. Perhaps he can't, because You Already Changed the Past and You Can't Fight Fate would conspire against him. Crash and Coco used the Time Twister in Crash Bandicoot 3: Warped with no apparent ill effects.
In Crash Bash the fight between Aku-Aku and Uka-Uka is to be settled by contests because they're not allowed to fight. Even though they already did in Crash 3... Even worse though, the game gives you two hero characters, and six villain characters. This wouldn't be so bad, as the series' characters are a bit lopsided on the villains side when this was made (only five characters in CTR had Aku-Aku as an invincible cast, of a cast of fourteen), but what makes it annoying is that of the villainous characters, one was on the side of good in Crash 2 (N. Brio), and one had never been seen before (Rillaroo). And yet confirmed villains Tiny and Dingodile are moved from the side of evil to good.
- To be fair, Brio wasn't really on the side of good in Crash 2, he was on the side of Not Cortex.
- In a more development excuse than story wise one, it was likely easier to use N Brio and Kong due to their proportional similarities to Cortex and Tiny, which allowed for easy model and animation programming. Rilla Roo was arguably created to resemble Dingodile for similar methods.
- Again, depending on who you ask, Retcon or Fanon Discontinuity.
- Could be that they were forbidden from fighting BECAUSE of their fight in Crash 3.
OK, in Warped, Uka Uka states that Cortex lost the gems and crystals (i.e. after his defeat in Cortex Strikes Back, they were left in the warp tower). How then, did they get out for the "future" levels?
- I recall reading in the instruction manual that the crash of the space-station somehow shot the crystals and gems through time and space. Doesn't really make sense though
  - In the Star Wars Expanded Universe book The Glove of Darth Vader, the explosion of the Death Star II created a wormhole than pulled debris through space/time... I doubt this is what Naughty Dog was going for, but there is a precedent, especially given the Crash franchise's loose grasp on science.
- For the fun of visiting space themed levels. Honestly, who travels through time and doesn't want to see the future? In any case, isn't there something paradoxical about collecting crystals from their original points in time and bringing them to the present? I mean, how did they appear in Crash 2 if they were removed from the timeline? Unless the Time Twister's malfunction somehow sent them back, I can't see how it'd work.

Crash Bandicoot 2 had too much of an elaborate location for the Crystals and Gems, could have a hidden character positioned them?
- Not unless A Wizard Did It. These are floating crystals, not your average buried-in-the-earth precious stones. Besides, who says

someone put them there?

- - Over time I speculated that someone who "knows" Crash positioned them. Outside of Cortex because that would be too easy.

So, as a fan of the series, I can't help but wonder why Activision hasn't made a new game considering the last one got both great reviews and sold rather well compared to previous installments, after they promised the fans not to do so. Seriously, what logic is behind withholding a new game after so long when it has a loyal fanbase, albeit a broken one, and got great reviews in the last one?

So, can anyone tell me what is it Aku-aku says when you collect the third powerup and start wearing him?

If the design changed for the Wii titles was why it wasn't released in Japan then why didn't they just redo the models like they always had?