All applicants for the Working Holiday Visa are required to bring proof of financial support, in the form of a bank statement, with them when they arrive in Canada. Immigration officials might ask for it.
The bank statement has to be issued no more than 1 week before the departure to Canada and it has to clearly prove that you have at least CAN$2,500. This amount should allow you to cover initial expenses and support yourself during the first 3 months of your stay in the country.