LancerStaff
Smash Hero
All true, and it's all carried over from 64. Well, I'm not sure how much the cannons give you if you lob a charge shot next to them, but it'd at least be a +1. If it takes multiple charge shots to take down the cannons then +4 would be possible. Though, I think Star Wolf's point timer starts as soon as the first phase properly starts, and they drop from +30 to +10 pretty quickly. As long as you kill the bosses fast enough the medal is yours, if that's all you're interested in.Truthfully, the main challenge is just defeating Andross quickly, because it seems that the faster you take down a boss, the more hits you'll receive; that's something that you must also do against Star Wolf if you want to reach the hit goal for acquiring a medal. I also read somewhere that destroying the cannons with charged shots without targeting them can give you as many as 4 hits if done just right, but I'm not even sure if that information is right.
If you're interested in absurdly high scores, then shoot everything you can with charged, unlocked shots. Or rather shoot next to everything with CUS. Charge shots give you a bonus, but only if you don't hit a bonus giving target directly. In 64 if you were good then you could throw out CUSes at any enemy squad since CUSes had a timer before they blew, but now you need to hit a bit of scenery (or Slippy) because now they go on forever. Both 64 and Zero give you a way to cancel lock-ons, if you're wondering. In 64 you press L and R at the same time, and and Zero it's just L.
Let's see what else I can think of... Shooting certain enemies after they're dead gives you +1s. Some can be shot after CSing them, some can't. Notable example are the butterfly things in Sector Gamma, since they rarely fly close enough together to even get a CS bonus. Another thing is that CSes can trigger other CSes, which can give you an extra point (or two in the Landmaster) in some situations.