Pokemon essentials animations

hello all this is my first post on any community so i don't know much about formatting and my question is that i am creating a pokemon fangame and i have already done with two Gyms and i am doing mega evolution for my game i have done all with sprites but there's no animation for it so i downloaded it from pokemon essentials all animations project and added picture mega.png in Graphics/animations folder and added sound effect in Audio/SE folder and added mega.anm to my game's root folder and now i am able to play it in animation editor by importing it but whent i do mega evolution in game animation doesnot show up