What moves badly poison your opponent?

Question

I only know of Toxic.

Answer 1

You can inflict bad poison by using the following moves:

-Toxic
-Poison fang
-Toxic Spikes (must be two layers though)

Answer 2

Poison fang gets poisoning more power each turn.

Answer 3

Fling (user holding Toxic Orb)
Malignant Chain
Poison Fang (50%; 30% prior to Gen V)
Psycho Shift (user is badly poisoned)
Toxic
Toxic Spikes (two layers)

Poison (Bulbapedia)