David Bradley overtakes the role of lead character once again, for the last time! And still no sidekick Steve James. :/ Though it doesn't seem like the reason he's not in this or the previous movie, he actually died of cancer the following year. Real shame! Check out his career here.
As for this movie, it takes a huuuge turn for comedy compared to the previous ones. Suddenly a kid is thrown into the mix, the characters move back to the labs, with a revenge kinda plot, with much more comedy than previous movies, plenty of chases, fights and amusing conversations. Compared to earlier episodes of the series it's like this... is something completely separate. There are ninjas though. Good movie.
rated 3/5: not bad