It really depends on the game but after you complete the missions then you have unlocked Yourself, Barricade, Blackout, Brawl, Megatron, and Starscream. (Decepticon version) In the Autobot Version, you unlocked Yourself, Bumblebee, Jazz, Ironhide, Optimus Prime, and Ratchet.
you can't unlock characters
please specify which game on the ds
fropqwr to unlock all characters
All characters are already available.
yes only one
Get gold trophies in all cups.
There are no unlockable characters
You have to beat the enimies
MVY759 is the code to unlock Nightwing on Lego Batman: The Video Game for DS
you can unlock luigi detective.
Once you beat the game (You don't have to get 100)You unlock all the autobots not megatron. that's all i know.
Dry Bones, Daisy, Waluigi, R.O.B (Robot Operating Buddy).