*Ahem
...THEY SHOULD HAVE BEEN PLAYABLE!!!!!!!!!!!!
OK, now that I got my angry fanboy rabble out of the way, while the number of trophies in Brawl is bigger than Melee's its disappointing that many of them weren't created from the ground up.
As un-even as the trophies were in Melee at least they put a lot of work into them. The trophies in Brawl use models from other games like Donkey Kong Barrel Blast, Super Paper Mario, Pokemon Battle Revolution, Mario Strikers, Wind Waker, Twilight Princess among others.
The best ones are those that were created from the ground up, like the trophies LuigiHann posted.