ALL of GaW's attacks are Disjointed hitboxes....
Fair is what you'll probably use the most. It's fairly quick, range is outrageous (can beat out a Marth Fsmash), CAN BE L-CANCELLED, combos with itself at low percentages, and can kill.
I tested the Chaingrab on fox (with a friend), and you can chaingrab a fox on FD WITH DI, until around.... 70-90%, and then they can DJ out of it. I'm guessing they can shine out of it at around 70 something, but I'm unsure. I'm also assuming that with Falco it works around the same. Chaingrab on Falcon til about 50.
Fun fact, towards the end of the chaingrab, you can get guaranteed hammers (though Nairachute is safer).
At 0% on spacies, a nondi'd dtilt is a guaranteed grab.
Apparently Mr.GaW's Up+B either has VERY LITTLE LAG or has Interruptable frames.
In case you haven't read the hammer rules....
First two hammers are never a one or a two. You won't get two numbers in a row, unless you've JUST DIED. The only time you have a TRUE 1-9 roulette is off the invincibility platform.
Dair is a GREAT move, just because of the secondary hitbox when you land, and the ability to Lcancel.
Also, GaW can be played like a better Kirby. DUCK ALL DAI!
Sorry if this post was kinda disjointed. I'm just trying to throw out helpful things.