I have a couple of them. ><
Well, the first one would be when I was trying to level up my Togepi to help it get more happiness to evolve. Well, I thought it was weak, so I did the whole switch it out for a stronger one to share EXP thing.. Well I just decided to go into the dark cave for the fun of it, and use Togepi anyway. O: Extrasensoried that zubat into non existence. I had a mouth gaping moment. Now.. whenever I am in a forest or a cave.... I have my Togetic out C: I feel bad for enjoying the one hit KO on zubats.. but oh, all those years of having to fight through tons of zubats in caves. TASTE MY WRATH.
Second WTF moment was when I found out.. if you lose to a gym leader.. or anyone else.. or even a pokemon... YOU LOSE MONEY. I did not know this until I went to take on Whitney. Many a face palms happened.
Third WTF moment was when I caught Larvitar on safari zone. o3o My friends were having so much trouble with that one, and I got it on my first try.
Fourth WTF moment (and the biggest) was when I had leveled up all my pokemon to take on the Elite Four. I plowed through everyone, winning, getting EXP, monies, and then I get to Lance. I'm halfway into the battle, feeling great, and as soon as I almost destroyed his third pokemon.... MY THUMB HIT POWER. I hadn't saved the game for like 4 hours either.. I lost over 30 levels. I lost my exp... I had to go through the elite four again D;
Fifth WTF moment was when I was trying to catch Suicune. I did the whole save before reaching legendary thing... WELL. I caught him and then my game had corrupted for a second because I was turning it off so much D; So I had to recatch it AGAIN. This time was easier though because I had some net balls.. x3
I'm sure I will have plenty more as I play through the game. XP