Cartoon All-Stars: Dark Dawn is a video game based on the Cartoon All-Stars series.
Optimus Primal LF, He-Man, the Brave Little Toaster, and Bucky O'Hare try to face the Fiendish Four- Megatron, Skeletor, the Giant Magnet, and KOMPLEX. As they fail, their princesses get kidnapped.
In the stories Megatron altered, he turned Optimus Primal LF into a frog, Skeletor reduced He-Man's power to zero, the Giant Magnet has the Brave Little Toaster caught within its clutches, and KOMPLEX has managed to capture Bucky O'Hare.
The Fiendish Four's master is Lord Nebula, god of all pollution, drugs, and alcohol.
Isaac, a young Venus Adept from Weyard, learns that his frog is actually Optimus Primal LF in disguise!
Isaac and his son Matthew discover that Lord Nebula is attacking with his Spiral Zone.
In this RPG, 2 groups of four will fight Lord Nebula.
Captain Simian, the leader of the Space Monkeys, reveals to be Isaac's future mentor.
- Isaac: A young Vneus Adept, he was raised in Weyard for his good sake.
- Optimus Primal LF: LF stands for Leapfrog, his codename. He was turned into a frog by Megatron and begins life as a frog forever.
- He-Man: Now weakened by Skeletor, He-Man will train to be strong.
- The Brave Little Toaster: Now in the clutches of the Giant Magnet, Toaster is imprisioned within a tablet.
- Bucky O'Hare: Now captured by KOMPLEX, he is trapped within his dungeons in the Toad Homeworld.
- Superman: Weakened by Lex Luthor's Kryptonite.
- Sailor Moon: Weakened by Megatron's love, Queen Beryl.
- Xena: Weakened by her enemies, especially Callisto.
- Captain Simian: Mentor to the team.
- Lt. Dirk Courage
- Deadeye Duck
- Seven Evil Exes (first boss, one at at time)
- Colonel Muska
- Baron Dark
- Nightmare Moon
- Evil Martin Brisby
- Giant Magnet
- Queen Beryl
- Carmen Sandiego
- Makuta Teridax
- Count Dregon
- Dark Surfer
- Chaos Chimera (semi-final boss)
- Lord Nebula (Final Boss)