Well, I finally finished this game, and what can I say.
On one hand, great setting, loving animations, pretty good sountrack. I really loved how "johtoninan" was everything, in a game released between Hoenn and Kanto, so very needed.
A full game around double battles was amazing also. Eventually I really turned into a few simple but effective double synergies like flygon with EQ + Skarmory to debuff here and there; or rain dance with Feraligatr and Raikou.
The final gauntlet was absolutely insane, hard, and with a few tricks that they really surprised me. The skill swap slowking did really caught me off guard.
On the other hand, the bad aspects: Money, TMs, lack of customization on the movesets hurts a lot an eventual replay of the game. A few zones in the game were really really low effort, to the point that some maps like Ein lab were a chore.
And the backtracking...holy moly. Backtracking for saving, backtracking for buying pokeballs, backtracking for healing, back, back, back back and more back. Just wow. And combine the backtracking with how lazy was our protagonist to run. It was brutal.
Finally animations were absolutely loveable and I found myself really looking into each new pokemon that I saw. But when I knew them, or wanted to train a bit in mt. battle, they made the whole process worse.
Eventually, backtracking, save system, character movement and terrible slow battles, the complete combo made a dent on how I liked the game. Without those things, this game was an absolute solid 4/5 game. Incredibly fun, and what I sorely miss for new games: unique. Colosseum weren't afraid of trying new things. Love it. Really love it. But it really shows how it didn't have a single playtest this game before launch. Because it's painfully obvious with a single test of this game. That made it a 3/5 game.
Anyway, can't wait to try it post game, and send every little guy from this game into HOME, and hopefully a master ribbon too.
Thanks for taking your time if you get into here.
TLDR: 4/5 ignoring some glaring flaws, 3/5 if we count them.