Block-heads (Gumby)
The Block-heads were two characters in the Gumby television series created by claymation artist Art Clokey; they were the humanoid, dark orange-colored nemeses of Gumby. As their name indicates, their heads were block-shaped and marked either with the letter G or J; they were silent and wreaked mischief and havoc wherever and whenever they could.
In the 1995 Gumby: The Movie, the Block-heads attempt to replace the entire city of Clokeytown with robots in order to ruin Gumbys benefit concert. In the video game Gumby Versus the Astrobots, released by Game Boy Advance in 2005, the Block-heads abduct Gumbys friends Pokey, Prickle, and Goo, and hide them in books throughout Toyland.