According to ESRB, this game contains: Mild Animated Violence
Parents, Stadium 2 continues the wholesome image of the franchise. However, if you think watching cuddly cute Pokémon getting fried, grilled, and beat-down in a more animated venue may be too intense for your kids, you might want to hold up the "stop" sign for this one. Also keep in mind that Stadium 2 isnt really a complete gaming experience in and of itself. If you're ok with that, Stadium 2 serves as a decent organizer and activity center for groups of kids to hang out and battle their Pokémon.
Do I really need to tell anti-Pokémon gamers to stay away from this one? I dont think so. Just looking at how this title is dominating sales charts also tells me I dont really need to say much to rabid Pokémon fans either.
For those who are undecided or have never played the original, keep in mind that Stadium 2 is not a stand-alone experience. It serves as an add-on to the Game Boy titles and is sort of the next challenge for trainers who have Pokémon level 50 and above. Make sure you already own a large group of diverse Pokémon at various levels or be willing to go back to the Game Boy titles to retrain your Pokémon to qualify for some of the game's tournaments.