It also means that multiple Grass Energy wouldn't have the same rule. Once you have the 1=2, every energy after that just adds 1 Energy, rather than 2.
Disclaimer: We don't have the English text for the card in question
and every now and then, Pokémon decides to overturn an old ruling, but here is how it would most likely work:
The "Psychic Mirage" Ability of
Gardevoir (BW: Next Destinies 57/99; BW: Dark Explorers 109/108) reads as follows:
Each basic [P] Energy attached to your [P] Pokémon provides [P][P] Energy. You can’t apply more than 1 Psychic Mirage Ability at a time.
While sometimes the English language version of the card doesn't work how an English speaker would think it would work due to a questionable (even though it is official) translation, in this case, it agrees with how the card has been ruled to function
and how it works on the PTCGO. Let us break it down:
"Each basic [P] Energy attached to your [P] Pokémon..." means this Ability does
not affect Special Energy cards, or any [P] Energy attached to non-Psychic Pokémon. It
does mean that any and all
Psychic Energy cards, the source of basic [P] Energy,
are affected when attached to Psychic-Type Pokémon.
"...provides [PP] Energy." means that instead of the usual [P] provided by
Psychic Energy, it provides [PP]. It doesn't care whether there is one
Psychic Energy attached to one of your Psychic-Type Pokémon, 10 of them attached to one of your Psychic-Type Pokémon, or 10 of them spread out among six of your Psychic-Type Pokémon; each
Psychic Energy now provides [PP].
"You can’t apply more than 1 Psychic Mirage Ability at a time." means a second instance of this Ability will
not replace the individual [P] of each [PP] providing
Psychic Energy with yet another [PP]. With the way it is worded, I am not sure if it is even needed but that is a discussion for another time.
So
@gumball51321, thank you for asking for my help, but your understanding of how "Psychic Mirage" works is incorrect... or else I am
really misreading what you have typed. Which has happened before. >.>