This was the first Pokémon game that I played where I didn't just level my starter at the expense of all others (go figure!). Brock was absolutely impossible for me until I stumbled upon Butterfree's confusion learned when it evolves at level ten. This fact is burned in my memory forever because the dopamine rush upon finally defeating that Onyx seared my little kid mind permanently. A game that has left such an impact on me can only earn full marks.