If Lilac from Freedom Planet was built as a robot by Brevon, it would completely change her character and story. Lilac is typically known as a dragon girl with magical abilities in the game, so being a robot would strip away her unique qualities. As for a crossover with Naruto, it would depend on how Lilac's robot form and story are implemented. If Lilac's transformation into a robot coincides with her gaining new powers or abilities that resemble ninjutsu or ninja techniques, then a Naruto x Lilac crossover could be possible. However, it would still require careful storytelling to ensure that both the Freedom Planet and Naruto universes mesh well together. Overall, it would be an interesting concept, but it would significantly alter Lilac's character and require thoughtful execution to ensure a successful crossover.