I am weird. My IQ exceeds 130, so the mathematics of Pokémon appeal to me.
Other videogame series I play are Zelda, Trauma Center, Ace Attorney, Ghost Trick (not a series yet, but oh well), Baten Kaitos, Tales, and Professor Layton. I also play a little known game called Magical Starsign.
My parents are a little overprotective, so I didn't know much about Pokémon until late Generation III, when there was nothing good on TV. When I saw Lucario and the Mystery of Mew, that really sparked a big interest. My sister also became interested, and got Diamond version that summer.
My first game was Emerald, which I later restarted to get a much better user.
My next game was LeafGreen, which I later traded to my sister for her CodeBreaker*, and eventually bought back from her.
That summer, I finally got pearl version, and some of the Pokémon on that game prove that I have OCD.
I got Platinum on the day it was released, and it has remained my favorite Pokémon game to this day. This time, I focused on natures in addition to EVs.
I had a sleepover the day before Black version came out, and got it with my friends the next day. I've had a lot of luck with IVs, and nearly everything I've trained with has at least one perfect IV.
I've also written a story that's a parody of Pokémon Platinum. It is very bad, but if you still wish to read it, it can be found here: 
The Palkia has perfect special attack, as does the Darkrai. Everything except the Arceus is EV trained and has a good nature. (Adamant for Giratina, Serious for Arceus, and Modest for everything else.)
It didn't work nearly as harmoniously as I was hoping it would, but I perhaps someone else can use it better than I. The battle occurred the day before Black and White came out, so it made a good finish to Gen IV, aside from the fact that I lost.
I used the Anti-Wondereye team as the basis for a sandstorm team later on.
At this point, I stopped training nothing but legendaries, but I still have a few at level 100 in case someone challenges me to an uber battle. My friend stopped using Wondereye, so I no longer had a need to build counters. I have many level 100 Pokémon; I would list them, but I don't want anyone getting an advantage.
I have caught a few shiny Pokémon, but most have been obtained on the GTS. Here they are:
This is the first shiny Pokémon I ever caught. I was walking through the sand in the desert on Route 111 in Emerald version when a shiny Sandshrew appeared. I spazzed out and threw a Master Ball (I had other Master balls; I clone) It has a modest nature, so it's not very good.
I was on Mount Coronet in Pearl version when a shiny Abomasnow attacked me. I was REALLY not prepared because I did not intend to catch any Pokémon on this trip. I was too paranoid about accidentally KO'ing it, so instead of damaging it, I threw every Pokéball I had before catching it in a Luxury Ball. It is currently in my Platinum game. It has an Adamant nature, preventing an effective Hail/Blizzard combo, but its Wood Hammer is devastating.
This was actually found in my sister's LeafGreen Game, but I was the one who found it. It was found in Ruin Valley. It has a Quirky nature, so it's decent.
I was sort of expecting a shiny Pokémon, but this one still caught me off guard. Earlier that day, I was in the Battle Arcade, when a trainer sent out a shiny Dugtrio. I stared at the screen angrily for a minute, then hit the power switch, knowing how the data structure worked. Later that day, a shiny Shellos attacked me on Route 212. I promptly threw a Quick Ball and caught it. It has a careful nature, so it could be better, but it could be worse.
Against all probability, I found a shiny Seaking in my Platinum game. It was only a month or so after I found the Shellos, so very improbable. It has one of those natures with no effect; I think it was Serious.
I have obtained many shiny Pokémon on the GTS, so this list will be long.
Always pay careful attention to the palette of the Pokémon you're looking at! It has a rash nature, and is used on a hail team with Abomasnow.
Like I said, pay careful attention to palette. This one hasn't been used; I believe it had a quirky nature.
It has a Jolly nature, so it's not that useful. Like Regice, It's never been used.
I can notice very subtle differences in color. It has a timid nature, which is pretty good.
I traded away a Rayquaza with a suckish nature (gentle), and this it what I got. It has a Rash nature, and is very strong.
Haven't gotten around to using this one yet, but I intend to. It's nature doesn't affect its stats.
It has a Rash nature, and will be used in a team that relies on the move Gravity. It has a ridiculously long name that is 10 Japanese Characters, and It's name is almost always cut off, overlapping other text or not shown because it's so freaking long.
Just randomly found this one. It has a Quirky nature.
I was looking for a Manaphy with a Modest Nature for my rain team, so I offered a Mewtwo for a Manaphy. I got this. It has a timid nature, so it wasn't quite what I was looking for, but it had been partially EV trained the way I planned on training it, and it knew most of the moves I wanted it to know, so I decided to use it. It's also good for showing off, an added bonus.
I have 4 of them, but I never got around to trading any of them over to HeartGold. Oh well.
This is the event shiny Raikou. I have 5 of them because I have so many games.
Like the Raikou, I have 5 of them. I have yet to decide on the final moveset.
Once again, I have 5 of them. This is the only one whose moveset I have no intent to even slightly change.