Pokémon TCG: Sword and Shield—Brilliant Stars

Gardevoir ND ability - and retreat/attacks

If I have Gardevoir ND on my bench (to turn all my :psychic: energy into :psychic::psychic:) does that mean that I can do the following:
1) Attach a single :psychic: to Mew Two EX and attack using X-Ball (attack cost :colorless::colorless:)?
2) Attach a single :psychic: to Mew Two EX and discard it to retreat (retreat cost is :colorless::colorless:)?

Thank you,
 
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