I've almost gotten through all of the game on the 3DS you can with the starters, I think I'm about 3 crystals shy. On Stealth Elf, who I have maxed, on the 3DS game can you leave dummies to distract enemies? If so how. I know about getting a dummy that stuns when she's hurt and stealthed but I haven't been able to do the other move which I've seen in the trailers for the bigger version.
You know I may have less. I might just need the 3 Chests from the last level of Galecrack Ruins (The Undead level.) to finish the Crystals up. I know my Wife is hiding more figures, both expansion packs, and the PS3 version from me for Christmas and my Birthday... Which Stinks.
I'm might try to see if I can find them and Portal them into the 3DS without taking them out of the box.
I also fear that the 3DS version is the vastly superior game because I like the platforming and the chase element of it.
Also Fun Factoid once you do the collect Cupcakes crystal a Cupcake will show up on Radiant Isle like the Teddy Bears and Flamingoes etc but, the Cupcake will turn you Skylander tiny when you eat it.