"Pikachu! Aim for the horn!!!" and other such monstrousities

[SonicThrust]

Uh-huh...And the infamous "Aim for the horn!!!" Pikachu vs. Rhydon battle. Oh dear...

This is the best one for me. I'm not sure if I've seen the specific episode, but I think it's part of a flashback or something in the Shaymin movie. It's obviously a great idea to use something that makes no sense again right?

I also like how leech seed was pretty much a one hit KO in the Koga gym battle.

 

[Alakazam17]

I remember in one of the Johto episodes it was stated that a Sun Stone "evolves Sunkern into Sunflora and Gloom into Vileplume."

I was like, lolwut?