I read this story years ago on LJ (and vaguely recalled the author claimed she was embarrassed about writing the story. Sam and Dean encountered a Charmander and Slowgro (but not sure I recall accurately). I think there was at least one leveling up that involved a gemstone, some time spent in or near woods and maybe Dean fishing using his Slowbro at the end of the story? It was a fun little story despite the side of wincest (may have only been implied, but not certain). Not sure in which season it might be placed, but season 5 or lower and no other characters were involved. Can you help? Thanks.