It seems that Dr. Doofenshmirtz from Disney XD's Phineas & Ferb and some of the sharks have been trading barbs on Twitter. Here's a sampling of their exchanges that lead up to his appearance in the Season 4 finale !
More Dr. Doof on Shark Tank:
Recap | Who's More Evil: Dr. Doof or Mr. Wonderful?
@thesharkdaymond You're a fashionable guy, what do you think of my labs coats? If you like those you'll love my inators. Hear me out?— Heinz Doofenshmirtz (@DoofDaily) May 12, 2013
What are you talking about @thesharkdaymond, he can't come on our show!— Barbara Corcoran (@BarbaraCorcoran) May 14, 2013
.@barbaracorcoran How bad can he b? Can he b any worse than the guy that wanted 2 surgically implant bluetooth in our necks?— Daymond John (@TheSharkDaymond) May 14, 2013
Note to self: My evil deed for tomorrow, create a @barbaracorcoran sized trap. This isn't the last you'll hear from me!— Heinz Doofenshmirtz (@DoofDaily) May 14, 2013