I'm not a modeler but I have some fairly clean sound rips for the UI (the confirm and back sounds, chao picking up animals/chaos drives, etc.) as well as mostly clean rips of the many voice clips Chao make. The voice clips sound grainy just because of being recorded back in dreamcast days, but I doubt you'll really find clearer unless you redo them yourself.
Also, a few English corrections for that list :D
these aren't major grammatical corrections (I wouldn't worry about full proper grammar until you're polishing everything up, unless you want to get it out of the way),
but mostly I'll point out some noticeable things.
If by Heat Minded you mean the Chao gets angry easily, Hot-headed is the more common term in English.
I think it was just a misspelling but you wrote hero as here.
Your Chao is getting worse works a bit better than gets more worse (if you were going for that 'archaic RPG' feel for that line ignore this, cause it sounds like it)
If 'your Chao happens something wrong' means they did something bad, you might wanna say 'did something wrong'.
instead of implanted, you can just use planted, since it's referring to a tree (as opposed to something non-natural, though it technically works.)
'You've unlocked a new garden' as opposed to 'you've become a new garden' (I believe you meant that as getting a new garden, in which case, the correction works better.
)
Those are the only glaring details, the rest is just small grammar which as I said, can be patched up later. :D