Many Pokemon evolve way too late to the point you have to grind in order to fully evolve them before the elite four. The game is very easy, with the AI constantly doing the worst possible option and trainers having very few Pokemon. The story tries to be something special but its young target demographic stops it form truly exploring its concepts. The rivals are great and have interesting stories and writing. The Pokemon introduced are great, tons of Pokemon I wanted to use but couldn't.

It's Arkanoid.

Decent overall, the normal trainers on routes are extremely boring to fight, but the gym leaders feel smarter. The elite four and champion are some of the hardest and most fun battles in the series. Decent Pokédex and the lack of Hms is great. Fun game.