Not sure I agree with the above posters.
At the moment, I am running Badboar in my Magneboar build, and I have found it useful. It's another option that's very helpful against certain matchups. Without it, you will certainly lose to anything running Umbreon. With it, you have a slim chance of victory. Without it, your DonChamp matchup probably hovers around 50-50. With it, you're around 60-40 or 70-30. The ability to KO anything in the game (excepting T-Tar Prime) is fantastic, and although Magnezone can do it, Magnezone has its weaknesses.
I find that it's not especially difficult to stack two Lightning and two Fire on a Badboar, especially if I'm already set up otherwise. The thing that makes Magneboar great is that it has many options. Badboar is simply another option.