Does anyone know what anime/cartoon this pic crossover with?

It's Gaaya-chan, a mascot character of Koshigaya duck stew.
It is said that Oborozuka, the town where Kobayashi and others live, is based on Koshigaya, Saitama.

Brightlight said:

It's Gaaya-chan, a mascot character of Koshigaya duck stew.
It is said that Oborozuka, the town where Kobayashi and others live, is based on Koshigaya, Saitama.

Then, should we consider it as crossover real life?