Mewtwo-Ex has an ability called Energy Absorption, which costs one colorless energy to activate:
Attach an Energy card from your discard pile to this Pokémon.
So, say I start my turn with two energy attached to my Mewtwo-Ex. Can I then activate this attack twice, and put two energy from my discard pile onto my Mewtwo-Ex in one turn?
If so, can I then turn this into a loop, and place every energy from my discard pile onto my Mewtwo in a single turn?