Faint attack or Night Slash?

Question

Should I teach faint attack on my weavile or Night Slash? They are both physical moves and weavile has really good attack.

Answer 1

Night Slash, it has a High Critical-Hit ratio. the power is also 10% better than Faint Attack. Accuracy Night Slash= 100, Faint Attack = infinite, Night Slash PP = 15, Faint Attack PP = 20