Dair/fair offstage is definitely G&W's best kill option. Though my favorite, of course, is 9. You can run off dair and still make it back, so G&W can cover almost any recovery.

Down throw combos into Jab and down-B if it's loaded.
Just trying to get a convo started.

Dthrow-Judge/Fsmash is also great if you don't have a full bucket. (I got bodied by someone doing that repeatedly once.)

Funfact: As soon as G&W starts his throwing animation all you have to do is hold shield and maybe a direction. If the G&W player chose to DThrow you this method guarantees a tech regardless of your DI. Really easy to do and takes literally no effort, so there really isnt a reason to not do this. Ofc if you want to do stuff like techroll in that means you have to press a direction which will mean bad DI for one of the other throws, but thats a tradeoff Im more than willing to take

Does G&W have throws that beat Dthrow techchase?

I think that if you're able to read a character's tech from the Dthrow, you can down-smash and catch them off guard.

I think it's character dependent. On Pacman, maybe, but not on Samus. If you go full Wizzy mode you might even be able to techchase the whole cast.

Did some testing. You can't. The only way to fix the whole reads thing is to do some mixups. Try grabbing your opponent on the side of the stage and throwing him off, after conditioning him to DI backwards.

Unrelated to Mr. Game & Watch but this is vital Sandbag information in terms of throws
Because if your foe knows how to DI at all, FThrow and BThrow go from "Yer dead at 40% which I can get easily off of one Down Throw" right into "God help me I'm worse than Kirby's Up Throw and that's saying something"
Luckily, your throw then becomes a literal 50/50 between "I (The person being thrown) shall live forever" and "I shall die quickly"
Sadly both of them launch at downward angles normally so if they DI up either way that'll hamper things
But y'know

Fun fact: fthrow with DI down kills at 0 on some characters near the ledge. Hopefully that never happens, but still. I guess proper DI is up regardless, but perhaps DI in is superior because if they uthrow you won't go straight up.

Am I the only person that gets triggered by how easily you can fall out of Game and Watch's aerials?

I don't really see what you mean. I mean, nair doesn't connect well so is that what you mean?

Yes. Nair is meh, but Bair triggers me so hard lol

bair and uair are awful at this, uair doesnt connect into itself at the percents where second hit kills and bair just never ends up connecting into itself which sucks since the last hit is really f*** good

Game & Watch can start combos with D-tilt, next to D-air and 9. That's my lucky trick