Hi, thank you so much for the comment, sorry for not answering before, got too busy working on the update (wich is already published if you want to check :3)
Balancing both the game battles and progression system are the hardest part in any game to me, i will be testing ways to make the progression to the evolutions be slower, the game is still in alpha so i haven't been giving as much time as i should to the balancing yet
Gaiamon (not appmon) has no image so i'm not implementing him, the lowest bar to be added to my game is having an official (colored) illustration, also having at least one confirmed skill but i have broken that rule before
Game balance is difficult I agree, good luck and hope you figure out something. I will be checking up on this game as I do want to see it grow and update!
About Gaiamon, you're right there's no image. It's a super cool digimon that effectively no other game has due to obvious balance reasons. Probably my personal favorite, ever since I saw it playable in a fan interpretation, in some obscure fangame.
I understand official art is a solid bar to have though. There is some official looking fan art of Gaiamon but it'll never be the 'canon' Gaiamon.