Noob moments:
1. Back when I was very young and first started playing Pokemon, I couldn't understand why, while I was playing Pokemon Stadium, Hyper Beam couldn't hit Gengar. I didn't know that Normal-type moves couldn't hit Ghost-type Pokemon.
2. When I started playing FireRed, the first Gen 3 game I ever played, I tried to hit Koffing, who has Levitate, with Earthquake. Since it was my first Gen 3 game, I didn't understand much about abilities.
3. More recently, actually within the past year, I started playing Gen 4. (Yes, I know, I was behind). I didn't quite realize that moves now have a Physical/Special split based on the move itself. Therefore, I was wondering why Luxray's Thunder Fang seemed to do just about the same damage as Discharge. However, now I'm up to date with the Pokemon games.