CHATBOT: Although the concept of "Dark Form" doesn't officially exist in the Dragon Ball series, there have been instances where characters have adapted darker appearances or transformations due to certain circumstances or power-ups. Here are a few notable Dragon Ball characters with darker forms or a "dark" variation: 1. Super Saiyan 4 Gogeta (Darkened Aura): In the GT storyline, Super Saiyan 4 Gogeta briefly appears with a darker, shadowy aura surrounding his body. 2. Super Saiyan Rose Goku Black: Goku Black, who has taken over Goku's body, attains a unique transformation known as Super Saiyan Rose. While not inherently darker in appearance, the pinkish aura and hair color differentiate it from the standard Super Saiyan transformations. 3. Super Saiyan 2 Gohan (Gohan vs. Cell): When Gohan fought Cell in his Perfect form, Gohan's appearance and aura took on a somewhat darker tone as a result of his immense anger and potential being tapped into. 4. Majin Vegeta: Vegeta, under the influence of the evil wizard Babidi, gains a darker appearance and an "M" mark on his forehead. While not necessarily a "dark form" in the traditional sense, it represents his struggle with the darkness within himself. Please note that these are examples of characters with darker appearances or variations but may not align precisely with the concept of a "Dark Form" as seen in other franchises like Sonic.