Aww, I love Corsola. It may not be very useful, but it's still one of my favorite G/S/C Pokemon. I chained for a shiny one in Platinum.
It really could us an evolution, though.
EDIT: Just looked it up, and wow, I didn't realize its stats were so horrible. ._.
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"First time I got punched in the face, I was like "oh no", then I was like "this is a story"."