>>34585766The abilities being where they are makes more sense for their designs, but not for their actual use in battle. And let's face it: Toxapex with Corrosion using Baneful Bunker would be broken as fuck.
Regardless, being able to poison any target means you can use Venom Drench on Steel and Poison types now. Only issue in Salazzle's case is that since she's already a Fire type, Corrosion's only real use is for puncturing a hole in Steel types with Sturdy (specifically Magnezone, Forretress, Steelix, Skarmory, Aggron, Bastiodon, Probopass, and Togedemaru).
>>34585810It's just a Dragon special attack. In Salazzle's case, it's one of two Dragon type moves she can learn, the other being Dragon Rage. For a fast special attacker, Salazzle's movepool is painfully limited.