Adrenaline is....
Beating the Pokemon League with a single Pokemon left with 12 HP. I had to use a ton of heal items, and sometimes all I could do was wait until the enemy Pokemon ran out of PP. But seriously, the computer is a cheater. Every Pokemon I fought knew at least three different kinds of moves so it would always have one effective against you. A Psychic type that knows Earthquake, a Fighting type that knows Dark moves...Ugh. I don't know if I could even do it again, but I don't plan on trying for awhile. First things first - I'm putting in my GBA Pokemon games and transferring them to the Pal Park ;)