As of now the only real reason to link a pokemon in chat is to view stats. There isnt a /list command because that feature is built into the pokedex, but if you don't have the seen/caught data you still have no clue as to where a pokemon maybe located. It would be great if we could collect seen data from pokemon linked in chat. This would make it easier for those wanting to find a certain pokemon and easier for those that want to complete the pokedex.