Oh man... i'm really sure it's using modified engine of Pearl or Emerald
Yes, it's using a modified version of the Platinum version, which was a modified version of the Diamond/Pearl Engine. It's all slightly different, but all the same graphical style.
Signature
"WHAT!? OVER 9,000!? Well, I'm back to cowering under my desk! Cheerio!" ~Ninjatown, probably the best DS game in exsistence!
Black DS Lite w/ M3 DS Real Flashcart + Rumble Pak M3 Sakura v1.45 M20 English Firmware ~~~ Black DSi w/ No Flashcart + 1GByte Sandisk SD Card