How to Derive an Attack Move a "char" from it's Animation in Fighter Factory

[Asef Hassan Amiz]

My Greetings Everyone, I need a little help in character editing, so i came up with this Question.

Well there are many mugen "char" which have special effect sprites like Fire and lighting all around them in some of their animations, mostly fighting animations like Fire Kicks & etc

but when i checked these "char" sprites in the Fighter Factory Ultimate, I saw that the Fire Special Effect was one Frame of the Sprite and the Kick was Another Frame

But in the Gameplay, the Kick and the Fire Happens together Forming A Fire Kick,

So my Question is How Did they Make this Fire & Kick Sprite take place together simultaneously in the Game ?

How Can I Merge 2 Frames together into 1 Animation simultaneously ? please help & Thanks Everyone