Hi! I’m really glad you completed my game, I hope you had fun!
Yes, it’s true that poison moves don’t scale too well when enemies have a lot of HP. I’ve slightly improved Croagunk poison move upgrades and added two new items to the game: Red Nectar, which applies 3 additional poison stacks each time poison is added, and Purple Nectar, which prevents poison stacks from decreasing at the start of the enemy’s turn.
As for Empoleon, that’s just bad luck haha, all enemies and bosses that belong to the same area have the same spawn rate, and Empoleon is 25%.
Thanks a lot for your comment and for playing! :)