Croagunk will attempt to evolve starting at Level 37.
Croconaw evolves at level 38, not by a stone.
the symbol Pokemon of pastoria is croagunk as shown in the Pokemon episode diamond and pearl #082 cream of the craogunk crop. since croagunk is its symbol they have a sign in pastoria to help you feel as awesome as croagunk by looking like it through the sign in platinum.
Arbok does not evolve
you need to trade it for it to evolve
Once you have a Croagunk egg, it doesn't matter what pokemon are currently in your team- Croagunk will hatch after around 2560 steps. However, a pokemon with the ability Magma Armour or Flame Body will halve this. See Related links. If you mean "What pokemon breed with Croagunk to get a Croagunk Egg?" then you can breed any Croagunk or Toxicroak with Ditto or a female Croagunk or Toxicroak with any pokemon in the Humanshape egg group. See Related link.
Croconaw evolves at level 38, not by a stone.
Croagunk(poison type) evolve at 37 into, the sneaky, Toxicroak.
Safari Zone
the symbol Pokemon of pastoria is croagunk as shown in the Pokemon episode diamond and pearl #082 cream of the craogunk crop. since croagunk is its symbol they have a sign in pastoria to help you feel as awesome as croagunk by looking like it through the sign in platinum.
That's easy, croagunk evolves at level 37-38.
Croagunk will evolve into Toxicroak at level 37.
It evolves at level 37.
Level 37
lvl 34
The Croagunk is there because of the Croagunk festival, as seen in one episode of Season 11 of the Pokemon anime called "Cream of the Croagunk Crop!".
croagunk evolves at level 37
Croagunk evolves into Toxicroak at Level 37. Also, if you wait one level, Croagunk will learn Poison Jab earlier than it would as a Toxicroak.