A lot of people tend to ignore Lucario from Legendary Treasures. While it isn't great, it's pretty decent with Machamp. With a Strong Energy, 2 Machamp in play, and a Muscle Band, Aura Sphere does 130 to the Active and 20 to the Bench, and you deal an extra 20 with the Ability, maybe 40 damage total if you last more than 1 hit. It isn't great though, defenitely not enough to run a deck. If you want to try it, I recommend a 2-2 line at most, and only use it when you know you can last more than 1 hit.
One Fighting Type that hasn't seen much use whatsoever is Gliscor (Phantom Forces). While not strong, it can shut down entire decks for a turn or two, and gets damage boosts from Machamp, Strong Energy, Fighting Stadium, and Muscle Band.
Speaking of which, if you can't afford Donphan, use Gliscor (Boundaries Crossed) instead. It isn't as good as the Elephant, though.
Things that make Donphan better:
-More HP.
-Less Energy needed to attack.
-Has Wreck, which will OHKO pretty much anything with damage boosters.
Things that make Gliscor better:
-Lower retreat. This is especially nice since Beartic will need a Muscle Band to OHKO any of your Gliscors.
-Less expensive. While Donphan is usually $6 each, Gliscor can be found for a measly $1.50 on average.
-It's a Holo!
-Poison Ring can be used in unison with Lysandre to stall out a Pokemon for a turn or two if your opponent doesn't have Energy or things like Escape Rope, Switch, or Keldeo-EX.
-By using Gligar from Phantom Forces, you might be able to trick some players into thinking that you're using the Gliscor from Phantom Forces, not the one from Boundaries Crossed.