Haven't used him yet, but still have to find a few pieces in zone 6, 7 and 8 Although I have to admit that if I hadn't accidentally stumbled into the hidden alcove in 6-k where the 2 electric beetles chase you, I would prolly still be searching there. Did the lvl god knows how many times and was stuck on 1 piece for ages XD
Full sig in quote, cookie for who knows who said it. cookies given so far 7 http://img836.imageshack.us/img836/868/howiwasthedeviljoe.mp4
Squawks will be on the lower left-hand side of the screen and part of the HUD. He'll squawk when you're near a piece, and almost go berserk when you're right next to it (or next to a bonus barrel). Basically, he's acts like a sonar or gauge.
But yeah, I've used Squawks a lot; mostly because I was lazy and just wanted to get the pieces that I missed. However, by world 6 and decided to find all the pieces on my own, and for the most part I could...with the exception of some really annoying pieces that I felt stupid for missing.
I seem to remember back in World 4 (in Crowded Cavern I think) where you had to jump on the rickety bridge, then jump off, and get the puzzle piece that falls from the sky. I would not have thought of that to be honest. :/
My Let's Play / Youtube Channel: http://www.youtube.com/user/sparx401