1) Getting Pokerus off a Sandshrew in the Safari Zone in HG. (Total Pokerus games: 3. I have it on Pearl, Plat and HG)
2) Getting a Bold Suicune with LEGIT Pokerus, on HG.
3) Stalling out Ho-Oh with a Lv 1 Flash Fire Houndour (HG-- if you think about Ho-Oh's moves, you'll understand why I did this. That Houndour didn't lose a single HP.)
4) After repeated attempts, getting Dialga in the second Quick Ball (Diamond)
5) Catching Articuno in two Ultra Balls. This has happened twice now, I swear the bird likes me. The other two birds are more problematic though
6) Timid female Gastly in the HG Safari Zone with a Sp Attk IV of something like 29-31. (it's Lv 17 and has a Sp Attk stat of 44)-- also got one on SS, Timid Female with Sp Attk of 43.
7) Specs Ampharos 2HKOing Clair's Kingdra when Hyper Beam missed. >:D
8) Feraligatr's Ice Fang freezing Kyogre. I was shocked. (Then during the battle with Clair and Lance at Mt. Moon on my restarted SS, Rival's Feraligatr froze Lance's Lv 75 Dragonite with Ice Fang.)

From Platinum:
1) My Froslass wiping out half of Cynthia's team (Garchomp and Togekiss with Ice Beam, and Roserade with a critical hit Blizzard)
2) This:
"Houndoom used Crunch! It's super effective! Spiritomb used Silver Wind! It's not very effective!"
Me: I'm running low on PP, let's switch to Flamethrower...
"Champion Cynthia withdrew Spiritomb!"
Me: Oh crap here comes Milo--
"Champion Cynthia sent out Lucario!"
Me: -- tic?
"Houndoom used Flamethrower! Critical hit! It's super effective! Foe Lucario fainted!"
Me: *Proceeds to sweep*

Edit:

Modest natured Mewtwo from SS. Now residing on HG.
Restarted SS and got an ADAMANT-natured Lake of Rage shiny Gyarados, finally.

When I caught a groundon asleep with full hp with 1 pokeball, on my first try!

Getting lugia in silver with only 2 great balls.

Walking to route 101 after beating Steven for the first time and having Latios be the first pokemon i saw.

Delete post.

Why didn't you just delete it yourself since it was the last post before I got here?...meh...

My best day in pokemon would be without question when I got my first & only shiny starter, Charmander...it was in LG & I only used it to get through my file cause I couldn't make the time to reset for shinies of any other pokemon that I wanted on my team...I also got a Shiny Lapras by the same method that same file which I have long since erased...

I still have the Charizard & Lapras to date thanks to Pal-Park...

Oh. I didn't know you could delete your own posts. You can't do that on every other forum I go to.

I know...it is kind of needed & I'm glad this forum has it at least if anything...

My second best day in pokemon is when I caught my Shiny Golbat in Stark Mountain as it marked the start of the wonderful thing known as RNG...I no longer have my Platinum file which I caught the Golbat in so no more of that for me until later...

The Best Pokemon day would have to be when I first beat Red on my original Gold game.

Unfortunately the games save broke,losing all of the epic Pokemon on it. D:

Me being so worried about catching and catching at full power with a pokeball..... goodtimes

When my freind traded me his kadabra (not sure about spelling) which was a high level, for one of my low leveled Pokemon he traded it because it wouldn't evolve and well yeah it evolved because of trade

Just basking in the old days of yellow, and the happy days of crystal are the best pokemon days of my life.

I suppose the luckiest day of my pokemon career was the day I tried catching Munchlax in Platinum. I found out which trees I could find it on, smeared two of them and came back later. The second one I smeared on route 205 had an Aipom, the first tree I smeared (in Floaroma Meadow no less) gave me a female Munchlax with a brave nature and the characteristic "loves to eat". Can I get a number crunch on that?

My best Pokemon day probably when i found two shinies at one day, a Sandshrew and a Spinda.

I have 4 two competitively 2 not competitively
CC=Challenge cup and UU= Underused tier

I've never won a tournament but damn i came close twice in CC tournaments Making the final round in those two

a long time ago before the start of 4th generation I think '06 or '07 I was back on Pokerealm and and was doing a forum CC tournament It was a long and hard tournament 1 draw and 1 loss in the final round.

Right at the start of the uu overhaul I was expirimenting with teams and came across a damn hard rain dance team
we played three matches I won one to force a rubber match and lost two this would not have normally been significant but it was against the #3 UU'er on smogon at the time

recently i went back and played gold verson mine broke so i had to use an emulator but I was going through the elite 4 with level 45's I was not sure how it was going to go against Koga I won in eight turns (no joke) with just using my Typhlosion That is to this day the worst i've ever thumped a trainerbefore and after in game i've never thumped any significant trainer with that many pokemon that badly.
Here is how the battle went
turn 1 Flame wheel Ariados in the yellow turn 2 flame wheel ariados down turn 3 fortress down to another flame wheel turn 4 muk down to an EQ
turn 5 flame wheel puts venomoth in the yellow turn 6 venomoth down turn seven he double teamed with crobat thunder punch yellow his crobat wing attacked next turn before falling to a thunderpunch

Back in the days of Ruby sapphire when they introduced contests I played through the whole game getting everything i could and beating the elite four but that was not all I won not 1 not 2 not 3 but 4 seperate master rank contests beauty, tough, smart and cool winning the 4th was amazing At that point I put down ruby/sapphire for good I was going no where near the cute contest by that time i was over cuteness I was releived to have beaten the game and 4 out of 5 contests that is the furthest i would ever complete the game. to be a little redundant when I won that last contest there was an indescribable feeling of joy

My best Pokemon day is when I got a Shiny Lugia in Gold. Too bad it turned into the worst Pokemon day five minutes later...

Best pokemon day of my life was when i managed to beat Palmer's goddamn Heatran, Regigigas and Cresselia with solely with my DD Dragon Claw Mence (Platinum wasn't out yet) and complete the Battle Tower challenge

Worst day was several days later, when I lost my Diamond :/ oh well, i'd beaten palmer.

On my first encounter with Latias, she was Modest.

VICTORY.

Even though the ivs are kinda peachy though, yeah...

when a mate of mine said; oh I have plenty of feebasses do you want one ?
filled my dex that day
I had been putting off trying to find one for a while

Waaaaaay back on Pokemon Yellow when I caught Mewtwo with my very last non-Master Ball pokeball... And it was a Great Ball xD

Also when I OBLITERATED the Elite Four in Diamond with my level 100 Tentacruel

Definitely when I was a young'en and playing my older sisters Silver game, and evolved her Typhlosion. I was so proud of myself

Today is up there, played ShoddyBattle for the 1st time and kicked the crap out of someone, W00T!

bests pokemon day of my life.....

X-mas when i was still in high school-After annoying my parents every year since gameboy and pokemon came out, they got me a gameboy advancded and pokemon saphaire saying it was from santa(yes I still belive in santa, ya got a problem with that?). Of course they always said they would NEVER get me a gameboy. And this made me have to change my pants (hypothitacly speaking of course)

X-mas 09- parents got me a ds lite and let me use some "hands off" money to get platinum. Again they told me they would never get me one em.

Ahhhh, good times, good times.......

Well, i gotta add something that just recently happened. I started the Nuzlocke challenge and gets most of the badges and i find out that my starter was SHINY!