Base Neo format Metal Mewtwo deck. Original build credit comes from: Jason Klaczinski's Blog, minor adjustments have been made to this list.
This deck seeks to mercilessly strip your opponent of necessary energy sources, utilizing 4/4 Energy Removal/Super Energy Removal and Pokemon Towers. This removal package when coupled with opportunities to cripple opponents with well-placed Lasses and Muk, is only made more gruelling to play against by being largely able to Computer Search and Oak freely for whatever you need without fear (thanks, Energy Absorption and Aipom)!
Just when your opponent thinks things can't get any worse, remind them that Metal Energy, Scoop Up, Gold Berry, and Chansey all aid in helping you tank any hits they manage to get off before being run completely out of energy.
The strategy finally comes full circle when your opponent realizes Mr. Fuji, Cleffa, and Aipom almost certainly mean you're not going to be the one to deck out!
Metal Mewtwo is honestly disgusting to play against when in the right hands- shame on whoever designed this monstrosity!