Nodoka's Gardevoir
Gardevoir is a Shiny Pokémon as a Ralts that belongs to Nodoka Miyazaki. It evolved into Kirlia at some point and evolved again into Gardevoir after Nodoka ate some world delicacy noodles and learns Heal Pulse in the process.
In Emotional Evolution of Excitement!. Ralts tried to battle Cassidy and Butch but to no avail, in the midst of the battle, she evolved into Kirlia and learns Attract and Magical Leaf in the process,
As a Ralts
She is easily emotional which was shown in The Gardevoir of Eden!, where she evolved into Gardevoir and learns Heal Pulse in the process reviving Nodoka and removing the effects of World Delicacy Noodles, she can now talk via telepathy.
She was used again in Drawn to The Finale. Where she battled Negi's Gallade and learns Moonblast in the process, however it tied with Negi's Gallade after a Giga Impact collision which knocked each other out resulting it a draw.
As a Kirlia
She Mega Evolved for the first time in Parting Ways with Fireflies, After Negi's Gallade battle Team Rocket and lost, but Mega Gardevoir's newly found power was enough to defeat them with its newly learned Energy Ball.
She appeared alongside the Negima crew in Springfield Into Action!, Mitsuki had never seen a shiny before, asked Nodoka Miyazaki how she caught it, until Nodoka explained everything how she first met Gardevoir as a Ralts, and how it evolved, she Mega evolved in the same episode during a battle against Team Rocket and overpowered them with Hyper Beam due to Pixilate ability.
Nodoka and her Gardevoir
She Mega Evolved again in Shining Up The Gardevoir and protected Mio's Ralts from Team Rocket and used Focus Blast to send Team Rocket blasting off, thanks to her instincts. Mio was grateful about rescuing her Ralts that she wanted to become strong like her.
As Mega Gardevoir
This Shiny Gardevoir's known moves are: Hyper Beam, Psychic, Moonblast, Calm Mind, and her ability is Synchronize, as Mega Gardevoir, she has Pixilate.