Grim

Stepping out of the animated world and onto the comics page, Grim made their DC debut in 2006's Cartoon Network Block Party #21, brought to life by Scott Roberts and Cindy Morrow during the Modern Age. This is a character steeped in the irreverent, kid-friendly chaos that defined Cartoon Network's golden era of programming, sharing panels with the likes of Mandy, Billy, and even the Powerpuff Girls — Blossom, Buttercup, and Bubbles — in crossover adventures that made Cartoon Network Block Party such a treat for young readers. Grim's comics footprint extends into the gloriously titled Super Secret Crisis War! event and its dedicated Grim Adventures of Billy and Mandy one-shot, making those issues essential picks for fans of the era. Small in catalog count but big in charm, this is exactly the kind of character that reminds collectors why licensed comics from this period deserve a second look.