Deluge by macx
https://www.fanfiction.net/s/11919421/36/
Deadpool/Spiderman

Excellent story but then again I do expect that from this author. There is again the touch of the supernatural in this case Deadpool was a hell hound before weapon x experimented on him and instead he became a chimera. Something no one has seen before and one that everyone including Deadpool believes is unable to bond. Everyone is wrong it just takes someone who is willing to look under the surface. It takes a while but he and Peter begin to bond. And that is where the fun starts because everyone has an opinion and has to put their two cents in. There is action, romance, humor, and angst. I love Aunt May when calmly points out that she knows about Spider-Man and has known since high school. Poor Peter almost has a panic attack. The Avengers are nosy but finally back down. Deadpool is cute, protective, and bad ass. The author has given us characters that we want to root for and makes us wish that we could find someone like that, someone who becomes our whole world, willing to stand up to anything or anyone to protect the one they live. It is a kickass romantic story with the right blend of angst, fluff and action.