I have a good "news" (for the series) and a bad news (for this game).
The good "news" is that, looking at the staff in the Wiki, I could confirm that Marza Animation Planet worked on the intro of all the first three home console Mario & Sonic games (which would also explain why Nintendo went to them to have 3D models for artwork and not someone else - they were collaborating with them since 2008 for this series and probably were impressed by their intros).
The bad news is that Marza is nowhere to be found in the credits of the Wii U version of this game...
The good "news" is that, looking at the staff in the Wiki, I could confirm that Marza Animation Planet worked on the intro of all the first three home console Mario & Sonic games (which would also explain why Nintendo went to them to have 3D models for artwork and not someone else - they were collaborating with them since 2008 for this series and probably were impressed by their intros).
The bad news is that Marza is nowhere to be found in the credits of the Wii U version of this game...