Flash files in Graphic River Game assets ? Possible ?

Hi! I’m working on some creative game assets, and hope to include the animated flash files in addition to png files and the non-layered rasterized photoshop file. All the elements are hand drawn and not vectors but hi-resolution. Do I need to make the animations in photoshop ? is it a must if I would include animations or can I provide the flash file instead with better quality animations Ex: Zooming, Flashing, Exploding etc ? Please help