Nice find! This looks like Kirby DS music involving cooking. At the bottom of his final smash post, it says someting like "This song is also available", and the title of the song is something like "SHH! DS Kirby Cooking". I wonder why it's only on the Japanese site!
Incedentally, I Google Translated the page, and it gave me some funny translations. Here they are:
English
(Google Translation from Japanese)
Kirby: Final Smash
(Kirby: The last piece of wheat gluten.)
<Cook Kirby>
([C0ck])
Kirby is quite the glutton.
(Greed crawling star Kirby.)
He apparently even does his own cooking.
(His cooking is the MIRURASHII.)
Welcome to Kirby’s cooking class!
(Kirby's cooking classes, begin! !)
The cook puts on his hat!
(Kok has put on a hat!)
He takes out a giant pot!
(Giant Ciconia out! !)
Dinner’s ready! He rings his bell.
(Cooked rice. ~! And boil tap,)
He tosses his enemies into the pot...
( The enemy in a dump in Ciconia.)
Simmers them gently and deliberately...
( Simmer boil thoroughly. じっくりことこと。 It closely.)
OK! Order up!
( Yes, you bang your gore.)
Once you take out the stock, your enemy gets blasted off.
(Idol to take one, and'll shoot.)
But is that a real dish?
( But Allais.)
Something like stone soup, maybe?
(これって、いわゆる闇なべみたいなもんじゃないの？ )
Can you put just anything in there
? (This is the so-called black pot like?)
Are you sure?
(But what's good? Good?)
