Well, there are a few differences, given that those examples were all internally made while Pokkén was contracted out. It's also likely that The Pokémon Company managed the contract for this game (and any DLC) with Namco, unlike Smash which was either Nintendo with Namco or Nintendo with Sora and then Sora with Namco.

All of that said, I think any Wii U game releasing in 2016 must be released with the knowledge that Nintendo is abandoning its own ship. As a result, I think it's reasonable to think that a late console life release like Pokkén may have been intentionally stunted (or unusually neglected) as attention turns to future platforms and sequels on hypothetically bigger and more active install bases.