Corsola are one of those Pokemon you don't see very often and don't really wanna use seeing as other Pokemon can do a much better job. Corsola has higher defensive stats so you can use it as a tankish Pokemon but your better off using Toxapex or Milotic. Toxapex is much more tanky. Corsola does have a bit higher hp but toxapex makes up for that with its defensive stats. You may find a way to use the Pokemon and make good out of it but there are other Pokemon you may want to consider using before training corsola. Hope this helped. :)