Wallace and Gromit's Children's Foundation has secured a massive pin-badge deal with Tesco, Barclays Bank and the Woolwich to raise funds for 23 children's hospices and hospitals across the UK.
Branches will sell a range of badges in the run-up to Wrong Trousers Day on July 2.
"It's hard to say how much this will raise because it's the first year, but it will really help us to raise awareness," said Nicola Masters, director of Wallace and Gromit's Children's Foundation.
The Bristol-based charity started life as a one-off campaign to raise money towards a £12m fundraising appeal for the Bristol Children's Hospital.
The first Wallace and Gromit's Grand Appeal was held in Bristol in 1997.
The charity has achieved massive recognition through the well-known Aardman characters, and the three founding directors of Aardman Animation, including Nick Parks, are active trustees of the charity.
Last year, the charity held its first national fundraising campaign, Wallace and Gromit's Wrong Trousers Day, which raised £200,000.