This is the first fanon game in which Darwin appears(along with Gumball).
Orange 'n' Green
In Super Mario Silver Spurs: The Crossover Vacation, Darwin goes with the rest of the Watterson family on vacation. He becomes a companion to Luigi in the same way that Gumball does to Mario. In fact, Darwin even becomes a friend to Bowser Jr.
Darwin also appears in Gumball: Double Trouble as a major character. He has a slight rivalry with Mint Chewers in the game; however, his knowledge of underwater environments helps the group throughout their mission.
Here he appears as a playable character, rival to Godard.
|Mario | Gumball Watterson | Bowser | Sonic the Hedgehog | Luigi | Darwin Watterson | Miles "Tails" Prower | Bowser Jr. | Maria | Knuckles the Echidna | Pac-Man | Kirby | Finn | Jake | Meta Knight | Prince Fluff | Mordecai | Rigby | Pikachu | Donkey Kong|
|Shadow the Hedgehog | Metal Sonic | Metal Mario|
|Scourge the Hedgehog | King Boo | Dark King Boo | Cosmic Clones|
|Mephiles the Dark | Metal Sonic 3.0 | Dark Gaia|
|Mushroom Kingdom | Elmore | Highland View | Starship Mario 7500 | Earth|
|Mario | Gumball Watterson | Bowser | Sonic the Hedgehog | Darwin Watterson | Miles "Tails" Prower | Luigi | Bowser Jr. | Kirby | Finn the Human | Jake the Dog | Mordecai | Rigby | Pikachu | Ash Ketchum | Cilan | Iris | Dawn | Maylene | Steve | Creeper | Pac-Man | Knuckles the Echidna | Meta Knight | Eclipse the Hedgehog|
|Wario | Shadow the Hedgehog | Waluigi|
|Count Bleck | Metal Sonic 4.0 | Metal Sonic 3.0 | Mecha Sonic II | Dark Gaia | Magolor | Time Puncher | Demise | Ridley | Darkai | Galacta Knight | Boom Boom | Pom Pom|
|Cosmic Clone Mario | Cosmic Clone Gumball Watterson | Cosmic Clone Bowser | Cosmic Clone Sonic the Hedgehog | Cosmic Clone Darwin Watterson | Cosmic Clone Miles "Tails" Prower | Cosmic Clone Luigi | Cosmic Clone Maylene | Cosmic Clone Steve|
|Green Hill region | Highway View | Dimension World | The Dark Vortex world|