I think the AI is always smarter than me...even on Level 6. Like, they're really good at shielding and noticing when I'm about to attack them, which are tactics I've never quite gotten the hang of.
The only real advantage I think I have over the AI is that they don't seem to expect you to throw item capsules at them to open them. And occasionally they just forget to notice Kirby winding up his hammer and standing right next to them.