He said Mr Whippy has become a part of Kiwi culture, almost a part of the constitution of New Zealand.
But there could be a positive side to any modernisation.
"Mr Whippy competitors have a similar song, so it would separate us a bit," said Mr Bundle.
Mr Bundle has been Mr Whippy for the Wanganui region for five years and says he loves the Greensleeves jingle.
"Becoming Mr Whippy was the best move I've ever made. I wish I'd done it sooner," said Mr Bundle.
Mr Whippy normally travels to Wanganui several days a week but because of a broken ice cream machine Mr Bundle won't be back for several weeks as he waits for a part to be sent to him.