Gardevoir known in Japanese as Sirnight is a psychic and fairy type Pokemon that was introduced in generation 3. It is best known for being the waifu of every Pokemon fan.
Most hentai artists who draw Gardevoir like to give it tits.
In Pan's review of The Loud House, in which he was called out for being sexually attracted to every goth girl even if they're a Pokemon, he stated that the only Pokemon he'd fuck is Gardevoir like every other regular person.
Gardevoir was also mentioned in Pan's Sonic X review where he referred to the character Cosmo as a Gardevoir.
Gardevoir also has a special holiday known as "Gardevoir Day" every March 7 due to its' Japanese name "Sanaito”, which typically gets shortened to "Sana" as a cute nickname. In Japanese, “Sa” = 3 and “Na” = 7 and the day is March 7th, i.e 3/7.