I wanna be the very best! (Pokémon theme week, 10-17 May)

[Mercenary Pen]

And he can't remember what types are super effective to what,his rival has a blastoise,he has a pikachu,and gary annihalates him.

To be fair, the Blastoise was probably faster than Pikachu (unless Quick Attack or Agility was used), and with enough firepower to punch through Pikachu's meagre defences and massacre the yellow rodent. Besides, it was more dramatic to beat Blastoise with Charizard. Ash may not be the sharpest tool in the shed, but much of that is due to "rule of cool" trumping proper intelligent battling.