I'm starting to get a hang on the down-b menu spells a bit more. I've found some interesting uses for some of them (i'm probably not the first to think about them, but i'll share them anyway):
Edgeguarding:
- Sizz and Sizzle are very good to snipe offstage opponents, the speed of the projectile doesn't give them much time to react.
- Kaboom's explosion hitbox can cover the whole ledge, preventing opponents from grabbing it/hitting them if they hold on to it without invincibility (and possibly taking their stock in the process, shooting it from midstage should do it, timing is a bit tricky).
Alternatives to Zoom, offstage, to help horizontal recovery:
- Keep your jump, check the menu for Acceleratle, it nearly triples the horizontal distance you can jump.
- Against aggressive edgeguarders, check the menu for Kacrackle Slash or Snooze while offstage (a bit risky, but there's a chance you'll take their stock). Kamikazee is also an option to consider (depending on the situation).
- Bounce completely nullifies Snake's Nikita edgeguarding/Up-Smash ledgetrapping gimmicks. Pretty useful against Peach/Daisy's turnips too.
Speaking of Bounce, it's good against a lot of characters but it's insanely good against Mega Man. About half of his moveset becomes useless.