Dig 'Em still appears on the boxes, but he hasn't been seen on TV in over 5 years. Same deal with the "Honey Crisp Bear", whose name is Sugar Bear and the name of the cereal is Super Sugar/Golden Crisp, btw.
Franken Berry, Count Chocula and Boo Berry are all still around. They mostly only turn up on TV ads in October for Halloween.
The Cinnamon Toast Crunch chefs have all been retired, except for the white haired chef, Wendell, who still appears on the boxes but hasn't been on TV for some time. Similarly, Cookie Crook was just retired from use.