<p>Kecleon maybe considered weak, but you can change that slightly by making it into a supporter. Stealth Rock is well known but its useful. Knock Off sends the opponents item into the oblivion. Thunder Wave/Toxic to cripple enemy for later defeat. Last but not least the weather, Sunny Day and/or Rain Dance (depending on team preference). You could replace the weather moves with a Trick Room strategy, if your pokemon are slow, but Toxic is recommended instead of Thunder Wave.</p>