This animated cartoon fire is simple to create and allows for a wide range of customizations. The main components are metaballs and a particle system. You can create this cartoon fire in Blender without any addons, and it is rendered using the native render engine, Eevee.
You can watch the second part of this Blender tutorial here: CartoonCocktail.com/create-a-simple-animated-cartoon-fire-in-blender-part-2-cartoon-shader/
You can also buy a 37-page guide and the final Blender file on Gumroad at: