Pokémon Trozei brought some good new mechanics to DS and also a fresh air to pokémon design.
The Bad: Music don't change too much, and 60% of the sound is lost when coming out from DS speakers; ugly design in story mode, just following the hype; when you reach higher levels, forever and endless modes become unbeatable.
Pokémon Trozei came to consolidate a new way to enjoy puzzles and that can really be achieved through the use of a very well-known franchise. Remember the times when you were trying a puzzle game and just wanted to grab that piece with your own hands and drag here or there and you'll find out why this formula get what it takes. Sliding pieces is simple, easy to learn, and more accurate than it seems at first sight. Except for a (really) little time lapse when executing combos, the entire thing works pretty fine.
When it comes to presentation is fun to imagine someone gathering artists around a table and telling "let's do it all again but this time inside a circle" because some solutions ended very fine (take a look at Zubat), refreshing some ten-year old characters. And everything goes under good beats too but you can only hear it all with headphones (DS speakers don't get the bass).
Talking a little about climbing levels the game system can be unforgiving--you can't earn any kind of item to help you staying in that stage or something like that. You must beat at least 6 levels to save your progress and that becomes almost an impossible task at higher stages.
After all Pokemon Trozei is a good game stomping the ground flat for the next puzzles that may come out from developers' hats and being honest to a franchise that still counts so many fans around the world.