|First Appearance||Gumball, 2007|
| Kwesi Boakye
Darwin Watterson is Gumball's adopted brother, best friend, sidekick, etc.
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|
|Unova | Green Hill region | Highway View | Dimension World | The Dark Vortex world|