Gallade [delta species] 110HP [F][M]
Stage 2 - Evolve from Kirlia
{This Pokémon is both [F],[M] type}
[Poké-Body] Inner Spirit
If you have both Gardevoir and Gallade in play, each of these Pokémon's attacks does 30 more damage to the Defending Pokémon (before applying Weakness and Resistance).
[M][C] Rebounce Cut 30
Move an energy card attached to Gallade to one of your Benched Pokémon.
[F][F][M][C] Sword Play 60
If you have Ralts, Kirlia and Gardevoir in play, this attack base damage is 100 instead.
Weakness [P]
Resistance [-]
Retreat Cost [C][C]
I assume the Poke-Body is supposed to be akin to
Politoed LA, in which both of them get a boost if they are both in play? Originally I thought Politoed LA said 'those' instead of 'these', but I stand corrected! Though, I don't think you need to put the 'both' there.
Other than that, only minor issues arise. The "Energy" in "Energy card" should be capitalized, and Sword Play should have "this attack's base damage". Regardless of that I'm quite impressed by your card, and although Gardevoir and Gallade have a good amount of synergy, I don't think they've really had that kind of representation in the TCG, other than perhaps the Gardevoir NXD and Gallade PLS duo, but that's a weak parallel at best. Good job!
Creativity/Originality: 19/20
Wording: 14/15
Believability/Playability: 15/15
Total: 48/50