No, Cell did not definitively have Kaioken.
While Cell possessed the cells of Goku, who is capable of using the Kaioken technique, the show never demonstrated Cell using it.
Understanding Cell's Abilities
Cell's genetic makeup allowed him to use a multitude of techniques from various fighters. Here's a breakdown:
- Goku's cells: Cell inherited Goku's Saiyan biology, which meant, theoretically, access to Saiyan abilities like the Kaioken.
- Other fighters' cells: His composition also included cells from Frieza, Piccolo, and others, granting him access to their unique abilities.
The Kaioken Argument
The fact that Cell could use the Kaioken stems from:
- Goku's Physiology: The Kaioken is a technique taught to Goku by King Kai. The ability is tied to his unique Saiyan physiology.
- Cell's Genetic Makeup: Cell's design ensured that he could utilize the techniques of his genetic sources.
However, the key is that despite possessing Goku's cells, Cell is never seen using Kaioken. The only place where he claims to use Kaioken is in the Funimation dub of Dragon Ball Z Kai. This statement is not found in the original Japanese version of the show or the manga.
Lack of Confirmation
The essential point is that:
- No Manga Evidence: There's no visual or narrative confirmation in the Dragon Ball manga.
- No Anime Evidence (Original): The original anime series also does not depict Cell using Kaioken.
The Funimation dub line should be considered an adaptation choice not canon to the series.
Conclusion
In conclusion, while Cell theoretically could use Kaioken, it is not confirmed or seen in the original manga or anime. The dub is not a source for the core canon. Therefore, based on the evidence, Cell did not have Kaioken.
