Boobie LadyLitchi partly as I've got the PSP version of the first game. But in that case only the consoles and the PC could support 3D if the game had support in the first place. Which they sadly don't as the "world" isn't in 3d like the FPS that are in 3D.
The best way to see the video is Via the 3DS eShop, which shows the Trailer at 90% actual size. (The trailer is the exact same one that is shown on websites.)
None of those artifacts will be seen in game, mainly as they're are result of putting it online, not the game.
However, If don't take your said as exactly what you mean.. Textures being images are often needed to be compressed, but given the nature of most of the Pokémon designs this shouldn't be noticeable. As the Model maker for the Unknown and Luvdisc in my signature, it know exactly how it's made. I can say that there are no texture images used. Lucario has one or two.