level lickitung to 33 and let it learn rollout. after the battle is over, it will evolve
You catch Likitung and level it up until it it evolves.
yoou can't find it you have to level up a lickitung and teach it rollout then it will evolve
You get Lickitung by trading it with the person in the top observatory corner of the stop to the left of Fushia Cty.