Machamp/Miltank? O.o

So my friend told me to make a bad deck, and I instantly thought of Miltank (not that she is bad, she is great). I decided to pair her with Machamp since I have four. When I finished, I played against my friend's Blastoise/Keldeo/Mewtwo and went 5-1. I don't know if he just got bad draws or what, but I didn't think Machamp/Miltank had a chance. I'm not the best at making decks, but here's the list (standard format):

4 Machop
1 Machoke
4 Machamp
4 Miltank
2 Lucario EX
1 Jirachi EX

8 Fighting Energy
4 Strong Energy

4 Muscle Band
1 Prof. Letter
4 Rare Candy
Dowsing Machine
4 Ultra Ball
1 Vs Seeker
1 Switch

4 Korrina
4 Sycamore
4 N
2 Colress
1 Lysandre

1 Fighting Stadium

So yeah... I don't know if it has potential, I still think it is bad but I haven't taken it apart yet. Thoughts?

Well, I'd have to know the composition of your friend's deck to determine whether that was a fluke or not, but I'd like to know what sets the 'mons you are using are from. There's 3 different Miltank and 3 different Machamp currently play-legal at the moment.