Username: Peitharchia.
Partner Pokemon: Cresselia.
Why you want to join the club: I love psychic types (who doesn't?), and would definitely enjoy spreading it here, haha.
What is your favourite Psychic type, both competitively and casually? Why?
One that instantly comes to mind is Espeon. It's very adorable in terms of design, and when it comes to competitive battling, it could be decently helpful, too. Thanks to its Magic Bounce ability, it's able to send any non-damaging move back to opponent (Stealth Rock, for example). This not only saves you from having to deal with them, but it also makes it a problem for your foe, which, I believe, is brilliant!
Aside from Espeon, I'm also a pretty huge fan of Cresselia. Its appearance is very unique, I feel, especially for a legendary, and it is very powerful (but not enough to be banned to Ubers, which is a plus). It's got enough bulk to endure a ton of hits, and is able to strike back even harder afterward. It has access to recovery moves as well, such as Moonlight, which helps it regenerate its health every time they are down. Have used this Pokémon plenty of times before, and it has never disappointed me, thankfully.