Not the dev, but they probably did it this way for simplicity, instead of coding 18 different types, they made 6 groups of three so its easier to balance. Don't get hung up on the original games types chart, the only onde you need to learn, and that takes 2 minutes, is WHITE > BLACK > YELLOW > WHITE.
Just as a fun fact, here's all the original types inside every Pokémon Overlord type:
I tested this using the same team against Youngster Joey, and I think you're right. Started with Doublade and Gogoat, the first time I won with only a Flawless Victory. I reset, picked the same team, and this time I won with both Flawless Victory and a Wipeout. And in both my exp after the battle looks exactly the same.
Do you mean the one that gets filled after the battle ends? Pretty sure it's how much exp you get from the battle. Also, you get a X2 bonus if you wipe the other team AND/OR if none of your mons faints. If you do both on the same battle, you get a X4 exp bonus, which is really helpful in the late game.
Love the game, just unlocked the Mewtwo mode. I also beat the cursed key Boss for the first time, but nothing happened. Was it because I did it after the grandfinals or did miss something? No need to tell me what should happened or how to proceed, just want to know if my game bugged or not.
Edit: found a bug on the Mewtwo mode. If you go through the door with the password and interact with the truck, you get a blank text box and the game softlocks because you can't close it. Not something unavoidable, as it doesn't matter if you get Mew in this mode, but I think it's worth mentioning it.
Have to say that happened to me yesterday on v1.5. It had 2 AP, the first time it used Struggle just fine, the second time it said it was going to use Struggle again, but then he vanished and landed on my mon for big damage.
Something might went wrong when you saved your game. Mine asks if I wanted to suspend the game, and after the confirmation, I got sent to the main menu, and the option to continue the game was above the New game Button.
I don't have every single one yet, but I hope my progress can help you.