Moemon Platinum vs Champion Cynthia (underleveled)

Cynthia is one tough cookie. Still possible to beat without grinding, items, etc. but you need some higher-tier mons like Gyarados and Steelix. Without resorting to pseudos or legendaries, I needed to work pretty hard for a good battle item or two (I opted for a focus sash).
As always, mad respect to the extremely talented pixel artists over at Moemon for designing 4 gens worth of custom Moemon sprites.