Twisted is one of the best in the entire series-fun, challenging and innovative.
As I played, I realized this was no ordinary game. The thing about Twisted is that you have to actually SPIN the GBA to play each of the short minigames! See, there's a gyroscope fitted into the, well, deformed cartridge, and this senses movement! You could be doing small turns one moment, and then switching to full turns the other!
WarioWare Twisted has all the classic characters back, and each character has a specific way of playing the games. For example, Mona's games involve you making small, short turns, Kat and Ana's only require the A button, and Orbulon's games take twice the normal time and takes lots of concentration and patience. These different twists (pardon the pun :P) offer for a lot of fun to the game, and keep it from getting boring.
The minigames contained in each character's story are very short, often lasting anywhere from 1-10 seconds; boss stages are an exception as they are usually longer. A small phrase will pop up before the game starts, such as "Return!" or "Make Up!" and then the game starts, which leaves you having to quickly rack your brain to discover how to complete it. It takes some serious skills and reflex to master!
Also, the game gives you extras, called Souvenirs, that you can mess around with after a certain amount of completed levels (normally after a boss stage). These can be anything from instruments to figurines that you can spin around or play with. They're fun to use and unlock.
In conclusion to this short review, this is an excellent game that you really should own if you have a GBA. Just don't try it on a Game Boy Player, because you'll have a heck of a time spinning it. It's best saved for the handhelds-and you definitely won't regret playing it either!