Pro- The Pokémon,and  the stadium of which you battle in, as well as there animated moves are all in 3-D,  but the game does lag/ freeze a little during game play

Pro- The  game is addictive.You could spend hours just battling the cups, and frankly I really was just fine with the fact I didn't need to train any Pokémon or beat gym's like some of the other Pokémon games. 

Con- NO story.The  game has basically no story or dialog in it. You are already a  "Master" Pokémon trainer and are competing in a series of very challenging competitionsYou compete in various challenges which difficulty goes,Poke cup- easy, great cup-fair,ultra cup-medium/advanced, and master cup-expert/intense. 

 Pro- The game is long.There is a huge gap in power levels  in the different battle cups. The games CPU trainers Use different battle styles in each battle. 

Pro/Con(depending on how you look at it)- The game is hard. The CPU's ability, when it comes to utilizing and scheming a  plan to execute tactics that will easily crush your Pokémon team if your team is not well balanced and diverse when it comes to the Pokémon types.

I basically agree with all your pros and cons. This game was not really made to have a story. Yes you are already a Pokemon master, but I guess the only "story" is that you have to face tough challengers in events. This game was all around fun for a group of friends to play. 

I agree with the pros and cons, but I do think this game is meant to just be a battle simulator on the Nintendo 64 with some game modes, nothing more.