I have no idea if this animated monster will work in RPG Maker. But I'm willing to bet it won't without some plugins, or at the very least rearranging the animation frames on the grid required by RPG Maker. This asset doesn't have the exact animation frames that RPG Maker requires, so it's probably not going to look right. You're just working within some very strict boundaries, so if you want to use RPG Maker, you should probably stick to art that was made specifically for RPG Maker.