Nickelodeon Productions (2009)/Nelvana Limited (2005) (from the Backyardigans) (Widescreen) (4K)
From the widescreen version of the Backyardigans episode "The Action Elves Save Christmas Eve".
Starting in S4E9, the Nickelodeon Lightbulb logo was replaced by the Nickelodeon Productions logo from 2009. This logo combo is used for the rest of the series. However, there is another minor change in S4E14, where the copyright is 2010 instead. I will also upload this logo combo with the 2010 copyright notice in two different versions soon.
This is the Canadian version of it, so the logo combo is reversed, unlike the US and international versions. And the international and Canadian have this version of the end credits, whereas the US has a different version of the end credits.