I've done lots so far in Crystal with Aden the Magmar.Right now I've just easily beaten Jasmine knocking out all her Pokemon with a quick flamethrower and Fire Punch before receiving the TM Iron Tail and then saved right there. Here are the main updates throughout my journey so far.
Team:

Aden the Magmar Lv. 41
-Flamethrower
-Thunder Punch
-Fire Punch
-Sunny Day