So I developed some 2D arts using Unity’s newly (freely) released Anima2D, I would like to release it but as I am sure you guessed it depends on it. How should I go about publishing it? Include the asset (it is free after all), or warn people it requires Anima2D in the description?.
Don’t include Anima2D in your submission; it’s likely to get rejected by the reviewer.
Submit it without Anima2D, and at the top of the description warn people that it requires Anima2D (but mention that Anima2D is free so you don’t scare off customers). You can use to include a link to Anima2D in your store description.