DALEK-INATOR!
So a few weeks ago, was wandering around disney_kink for prompts and found one for a Doctor Who/Phineas and Ferb crossover, mostly the Doctor being out of his depth.
Laughed for a while, then came up with Irrelevant, with the aid of the wonderful Dqbunny.
Then WinterJameson made a comment about and while that was going on, on the other side of Danville, Doofenshmirtz had come up with a new device. The 'DALEK-INTAOR!'.
... He's not really sure what it does though...
Thanks to Elinor_dear for coming up with the Dalek's colour scheme. Doofenshmirtz's favourite colours! >D