Word: Groovy
Pairing: Perry & Doofenshmirtz
Perry had always noticed that his nemesis had an affinity for the culture of the 1970s. Oh, sure, he tried to hide his little peace signs and 1972 almanac, but they were there, underneath it all.
So when he announced his Groovy-inator, Perry was completely unsurprised.
"It will make everyone be stuck in the 1970s, in their fashion, hair, and speech! Then I will look more trendy by comparison! Of course, lab coats aren't exactly trendy...but you get the point. And I'd probably want to wear what they will wear..."
Yes, Heinz Doofenshmirtz was stuck in the 70s.