I believe that the name is a reference to Homer Simpson's Pinchy the lobster, but the description of the wish is very much from the Ren and Stimpy episode 'Space Madness'.
Borrowed /yoinked from http://www.infoshop.org/sf/index.php/History_Eraser_Button:
Toward the end of the segment, Ren introduced Stimpy to the history eraser button saying, "See this button? Don't touch it. It's the history eraser button, you fool!"
To which Stimpy inquired, "So what'll happen?"
Ren proceeded to give precise instructions, "That's just it. We don't know. Maybe something bad. Maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?" --Azaram 01:54, 6 March 2007 (EST)
It says you need gear from the stranglethorn fishing extravaganza to catch him and over 500 fishing. I don't thin this is true. I have 500 fishing without ever doing the extravaganza (+25 nat pagle's rod from hinterlands and a +100 sharpened hook lure) and not once did I ever have a fish get away, and was able to catch a mr pinchy. --Ndoki (talk) 21:57, 31 August 2008 (UTC)
Nodes no longer required? Edit
A comment in the article says that as of 3.1, it's possible to catch Mr. Pinchy without fishing in a Highland Mixed School.
Is this true? I don't remember seeing anything about this in the patch notes, and there are no comments on thottbot or wowhead about it. —The preceding unsigned comment was added by WoWWiki-Tracer (talk • contr). 01:31, August 7, 2010