I like to run scarf swampert on vgc since it has very good attack and with scarf it outspeeds very many Pokemon, but should I choose liquidation or waterfall?
Waterfall. Waterfall and liquadation both have a secondary effect and both being a 20% chance. Liquidations is defence drop (-1) while waterfalls is flinching. Flinching is better. But waterfall have 5 less base power. (Which doesn't really matter...)
WATERFALLLLLLLlll...