There were parts of the Lion King that were CG, 
like the stampeding animals in the scene when 
Mufasa is killed, but there was a lot of Lion 
King that was done with cels. (Over half of it, 
actually.)

Not many are up for sale, though. . . You can 
only get those sericel or "handpainted 
collectible cel" ones from most sources.

Many Sharp Smiles,
--Drac