With the success of Yenny, Álvarez decided to self-publish a comic book called Changuy with David Martínez, about a Batman-like crow.
[2] Álvarez developed the idea of including cameos of obscure Looney Tunes characters within the storyboard panels.
[2] David also freelanced storyboards for Cartoon Network's Mighty Magiswords created by Kyle Carrozza, whom he frequently collaborated with.
[6] The Indiegogo campaign did not meet its goal but David stated that storyboards for the series is still in the works, hinting that production is still being continued.
On June 20, 2019, David Álvarez launched a Kickstarter campaign for a Changuy origin issue entitled Rise of the Chango, which did not reach its initial goal of $3,000.