What happens if you use toxic spikes three times?

Question

I know if you stack it up twice will make the incoming Pokemon badly poisoned. Will three stacks make it more badly poisoned? I dont see this answer anywhere. Thanks in advance

Answer 1

One layer of Toxic Spikes causes opposing Pokémon to acquire the poison status ailment upon switching in, while two or more layers causes opposing Pokémon to become badly poisoned.

Nothing greater happens with more layers.

Toxic Spikes (Bulbapedia)