So just did a game VS a 
. he roamed a LOT like,8 kills in the span of 15 minutes apart from me,not to menton in that 15 minutes I was ganked by lee like 9 times so I will assume it also needs the junglers help...but I lost hard as fizz was very fed off the kills he got from roaming as somebody got the idea for his ult to slow,knockup and still slow
Can't tell what you played against Fizz as I see no games against Fizz in your match history...
But the basic strategy to deal with roamers is to push hard every time they leave lane, also ward your side bushes to stay safe from getting ganked.
Also don't just ping missing in your lane. Ping danger near your teammates so that they see it on their screen. (this will help you save blind tunnel-visioning allies from not noticing that your lane opponent is missing)
Lastly, If you are behind do not just follow the missing enemy - unless you are safe (have vision) and have escapes - across the map towards the lane they are ganking. You risk getting baited and caught/picked in the fog of war.
