No sequel planned right now. This game alone, even while smaller in scope, is quite a lot of work and cost. So for now, other games are a priority. Like some nice Sonic game with Cream~
Such a thing as Palmon Trainer will happen in the future. I postponed it as it was too big in scope. It was technically my first project, so while it was postponed, Gomamon Trainer was born. Palmon Trainer is something I definitely plan on happening.