Trivia: In the closeups of Goob on the baseball field, there are two billboard advertisements on the fence behind him - one is "Jungle Book" featuring Mowgli with Baloo, and the other is "Toy Story 2" featuring Woody, Jessie, and Bullseye.
Revealing mistake: Near the end, right when "little wonders" starts, Lewis takes a moment to look at his future family, Lucille, Frannie, etc. When there's a closeup on Lewis, his memory scanner reveals a reflection of no one in the gym, except for Lewis, even though people are supposed to be standing in front of him.
Answer: There's no indication that the dog had anything to do with Mr Peabody (especially since the dog didn't speak or do anything other than sit there). It was just a front for a throwaway joke.
GrafSpee
It's a coincidence because Mr. Peabody and Sherman was not released until 2014 and Meet the Robinsons came out in 2007.
But that film is based on the Peabody's Improbable History segment from the 50s/60s TV show The Adventures of Rocky and Bullwinkle and Friends.
Jon Sandys ★