Gardevoir is a Psychic/Fairy type which is honestly a really amazing type combination and it well suits this type of pokemon, also the design of Gardevoir does stand out to me, I like the color scheme & just how it looks, but I can see it being a design that doesn't necessarily appeal to most people. Other than that, Gardevoir actually has pretty solid stats all around, as well as having a pretty nice movepool & fairly alright abilities (Mega Gardevoir has better ability though) Overall, I actually think Gardevoir is the pokemon I have used the most out of any other pokemon out there when it comes to regular playthroughs of in the games & nuzlocking/wonderlocking runs of games, competitively not sure how much I've used it exactly before though since I don't play that side of things too often, but I am glad to call Gardevoir my favorite of Hoenn, but it was really tight between this and Sceptile/Swampert.
Coming in at #1 on my ranking is: