Creatures only do the Pokemons though don't they? All of the human and locations in the 3DS game credits seem to be modeled by gamefreak and by their outsourced contractors.
Either way, it's more expensive to pay folks to do 3D models and animate them and 3D locations than tilesets and 2d sprites will ever be.
What Gamefreak needs to do is invest in graphical engine, developer tools and expand, not just "more money" or "just put Morimoto in charge!!" like people around here claim. But I don't know how much money they have to do that, I used to think they were rich as fuck but the GI guy that interviewed them recently said the offices are much more modest than you'd imagine, and that it turns out the game budget for Pokemon games is defined by publishers and not them.