"Tu kanga machia du kanga!"
Phinabunk is the prehistoric version of Phineas Flynn.
Like Phineas, Phinabunk is smart, bright and full of inventions. He can invent things along with Gerb, his stepbrother, although his voice is raspy and only speaks cave language, until they invent English.
He was one of the five kids, along with Gerb, Isabelock, Boofgard and Baljug. Together, they made their own wheels and put them together as one big cart and rode it through town. Later on, at the end of the day, when Can-tok made a fire, he and Gerb decided to speak the English language, but to wait until tomorrow.
Phinabunk is physically identical to his present-day self, with the exception that his hair is slightly messier and has no eyebrows. He also wears a light orange one-shoulder monkey skin that stops at his knees with a patched pocket on the left side.
- The ending part of his name could be based on "Bonk the caveman".
- He is from 27,000 B.C..