Really, this game isn't bad, but you need to know some things before buying it.
Now, this game still has its cons, but most of them are mere annoyances than gamplay-ruining flaws. As mentioned above, you need a DS and Diamond/Pearl to trully experience this title. The announcer in this game is terrible. I liked the one in Pokemon Stadium a lot more. Before you do anything else, turn him off.
You can make custom phrases for your trainer to use in battle. However, these do not carry over to online play, so it kinda destroys the purpose.
Most of the Pokemon models (except the 4th gen ones) are taken from the previous console games. Most of them have been spruced up, but a few of them look hardly any better than they did on the N64. But otherwise, the graphics are beautiful.
Finally, the sound. Most of the sound effects, most notably the victory fanfare, are taken from Colloseum and XD. The music however is a wonderful collection of enthusiastic tunes. It'll remind you of Colloseum and XD in a few places, but other than that, it's all original. In closing, if you do not have a copy of Diamond or Pearl, you might not see much in this game. Otherwise, Pokemon Battle Revolution can be a fun way to experience Pokemon in 3D.