Alan initially appears as the main character of the Mega Evolution Special side-series beginning with Mega Evolution Special I. He is a Pokémon Trainer seeking to defeat all Mega Evolved Pokémon using his Mega Lizardon X. He initially worked as Professor Platane's assistant. However, he now works for Fleur-de-lis under the belief that he is harnessing the energy of Mega Evolution for peaceful purposes; to this end he works as a part of Team Flare, recognized by its members as being an agent of Fluer-de-lis. He later appears in the XY&Z arc of the XY series as a rival to Satoshi, working on Fluer-de-lis to continue gathering Mega Evolution energy.

(Source: Bulbapedia, edited)