Fizz's spells scale off Ability Power - consider getting items like Zhonya's Hourglass or Banshee's Veil against teams that have high burst threat - and items like Lich Bane or Rabadon's Deathcap if you think you can survive without the Health.
Since Fizz can move through units, find opportunities in lane to walk through minions and apply Seastone Trident's passive - following it up with the ability's active attack after a few seconds.
Fizz's ultimate ability, Chum the Waters, can be aimed at an enemy or towards the area where you think they'll be going.
Consider playing a bit more cautiously around Kennen when you have a Mark of the Storm debuff. If he hits you with 3 Marks of the Storm, you will get stunned.
Kennen is flimsy by nature - turn and attack him if he gets careless with Lightning Rush.
The stat comparisons shown on this page clarify some valuable Fizz against Kennen matchup statistics that can help us grasp the distinctions between the pair. For instance, Fizz’s KDA ratio ([kills + assists] / deaths) of NaN is better than Kennen’s KDA ratio of NaN, highlighting that Fizz may be more central to his team's team fighting capability than Kennen. This observation is in large part fueled by the difference in kills.
Fizz often has a slightly larger longest killing spree than his foe does. On average, he receives a similar amount of damage to Kennen. This is usually reflective of differing health capacities, but it can also illustrate that the champ with higher HP has less mobility and thus is unable to kite away from additional harm when poked or engaged.
Both League champions are great champions. Both champs have their pros and cons. In the game's current meta, Fizz usually wins when trying to fight Kennen, with a 56.9% win rate. Therefore, Fizz makes a fantastic counter to Kennen.
While Fizz does have a much higher win rate than Kennen, when facing one another, Fizz also has a greater level of difficulty that makes him a more challenging champion to learn and master. You should be be fine when picking Fizz into Kennen.
Furthermore, Fizz has almost no amount of CC and other utility, a similar amount to Kennen. This makes her just as valuable during team fights, especially when trying to counter champions with a lot of burst damage.
While there isn't one best champion for every situation in League of Legends, in Fizz vs Kennen matchups, Fizz is the better champion with a noticably higher win rate, more champion depth, and a similar amount of utility to help out your teammates during team fights.
Fizz is a great counter for Kennen. Focus your actions on increasing your CS and clearing objectives. If you do that, you should do very well as Fizz against Kennen.
To truly master Fizz to counter Kennen during both the early game and mid / late game phases of League of Legends, you should keep reading to pick up a few extra tips and tricks for this matchup. If you listen to the build and suggestions presented above, you will increase your win rate by a lot and be closer to League of Legends pro players.
Fizz usually racks up a similar amount of CS relative to Kennen. Champs who on average don't take many minion kills often don't require much CS to be effective, such as support champions. These kinds of champions are capable of scaling well off of their abilities and first items alone. Yet, champs with a lot of CS, such as hyper-carries, usually require several high cost items to be effective. In either situation, try to exceed the numbers reported on this page to do well.
The top items to use in your Fizz versus Kennen build include Luden's Tempest, Lich Bane, and Zhonya's Hourglass. When Fizz included at least these three items in his build, he performed a lot better versus Kennen than with most other common builds. In fact, Fizz boasted an average winrate of 56.9% when playing against Kennen with this build.
To have the highest likelihood of coming out on top against Kennen as Fizz, Fizz players should use the Electrocute, Sudden Impact, Eyeball Collection, Treasure Hunter, Coup de Grace, and Triumph runes from the Domination and Precision rune sets. Out of all the rune builds players used for Fizz vs Kennen clashes, this blending of runes resulted in the greatest win rate. In fact, these runes gave a 56.9% win rate overall.
By default, tips, statistics, and builds on how to beat Kennen as Fizz are given for every ranked division. If you would like to narrow the stats and builds to an individual skill level, you may use the selection menu located earlier on the page.