Be honest guys, Lance, Red, and Cynthia were some of the toughest champions of our generation in Pokemon games. Dragonite, Pikachu, and Garchomp STILL give some of us nightmares.
Look at Diantha's team.
Goodra, a Pokemon used as a tank, she uses a sp.attacking dragon.
Gorgeist, not really good if you dont use one to its full potential. diantha didnt.
Tyrantrum, REALLY SLOW, better dragon and rock types out there.
Aurorus, possibly the WORST member of her team. having two 4x weaknesses. its bad
Hawlucha, come on..why this thing, diantha doesnt use it right. she could've got something like a meinshao, lucario, or even a machamp and it would've been better.
Gardevoir, only good because it mega evolves. it still isnt as threatening as cynthia's garchomp or lance's dragonite was.
She doesn't even SWITCH OUT like almost all of the champions do. She ALWAYS lets her gardevoir go last, which is sad.