I thought this was a pretty good idea as Yanmega doesn't need energy with a cost of hand manipulation. Throw a few head ringers on the opponents EX and make the damage counters work for you with the help of frozen city. Any thoughts? It works pretty good so far, but only with EX-based decks. Also, since it's already expanded, I threw in a Tool Scrapper in case some garbodors jump in.
Pokemon - 15
* 4 Yanma
* 4 Yanmega
* 3 Yanmega BREAK
* 3 Foongus
* 1 Magearna
Trainers - 35
* 4 Sycamore
* 3 N
* 1 Pokemon Ranger
* 1 Hex Maniac
* 2 Lysandre
* 4 Poke Ball
* 4 VS Seeker
* 4 Trainers' Mail
* 4 Head Ringer
* 2 Revitalizer
* 1 Eco Arm
* 1 Tool Scrapper
* 4 Frozen City
Energy - 10
* 4 DCE
* 6 Metal Energy
Pokemon - 15
* 4 Yanma
* 4 Yanmega
* 3 Yanmega BREAK
* 3 Foongus
* 1 Magearna
Trainers - 35
* 4 Sycamore
* 3 N
* 1 Pokemon Ranger
* 1 Hex Maniac
* 2 Lysandre
* 4 Poke Ball
* 4 VS Seeker
* 4 Trainers' Mail
* 4 Head Ringer
* 2 Revitalizer
* 1 Eco Arm
* 1 Tool Scrapper
* 4 Frozen City
Energy - 10
* 4 DCE
* 6 Metal Energy