In KH2, there are certain plot battles in which Sora will come back from KO for a second chance. You get to play as one of his allies in the meantime. I shan't say who; that would be telling. XD Suffice it to say, I found the mechanism interesting enough to try it once, after someone else alerted me to it. I believe it's restricted to battles against the Organization XIII people, although I could be merely working from incomplete information on that.
The ally AI in KH is based on 'what did we do in previous battles that didn't get us killed?' There may be a subsidiary algorithm that tracks how much damage Sora deals or takes or something like that. I mostly tried to train Donald to cast Cure-type spells, but after the battle with @#$@!#% Ursula he managed to teach himself to cast Aero on Sora constantly. Never did manage to train Goofy to do much; I typically just activated his Berserk and Charge ability and let him bash everything else Sora wasn't paying attention to.
Dodge Roll is actually rather effective for getting behind the Fat Bandits and other similar giant tubby Heartless. Since you have to hit them either with magic or from behind/atop the head to deal damage to them, using Dodge Roll while they're the active target is a quick way to orbit them and then dispatch them with a combo from behind. Dodge Roll maps to direction + square when activated, so basically if Sora's moving, Sora can be dodging faster than his run. It's also effective against the Monkeyshines in the Tarzan world, who zip around faster than Sora can follow with mere running, and is the only reason I even kind of survived the battles with Dark Riku, who typically blocks and counterattacks if you just wail on him from the front. If you do the bonus battles in the Coliseum, it's also a good way to get away from Yuffie's Limit Break combos, and escape Cloud's Omnislash, which always cuts in a straight line.
Dodge Roll per se doesn't really exist in KH2, partially because there are special parrying abilities, and partially because Sora is much faster. You can also extend combos by more hits in KH2 -- I think I got it up to five or six before I quit chaining abilities -- so there's less need to dodge things when you can just hit them continually, so long as you have a sense of timing.
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The ally AI in KH is based on 'what did we do in previous battles that didn't get us killed?' There may be a subsidiary algorithm that tracks how much damage Sora deals or takes or something like that. I mostly tried to train Donald to cast Cure-type spells, but after the battle with @#$@!#% Ursula he managed to teach himself to cast Aero on Sora constantly. Never did manage to train Goofy to do much; I typically just activated his Berserk and Charge ability and let him bash everything else Sora wasn't paying attention to.
Dodge Roll is actually rather effective for getting behind the Fat Bandits and other similar giant tubby Heartless. Since you have to hit them either with magic or from behind/atop the head to deal damage to them, using Dodge Roll while they're the active target is a quick way to orbit them and then dispatch them with a combo from behind. Dodge Roll maps to direction + square when activated, so basically if Sora's moving, Sora can be dodging faster than his run. It's also effective against the Monkeyshines in the Tarzan world, who zip around faster than Sora can follow with mere running, and is the only reason I even kind of survived the battles with Dark Riku, who typically blocks and counterattacks if you just wail on him from the front. If you do the bonus battles in the Coliseum, it's also a good way to get away from Yuffie's Limit Break combos, and escape Cloud's Omnislash, which always cuts in a straight line.
Dodge Roll per se doesn't really exist in KH2, partially because there are special parrying abilities, and partially because Sora is much faster. You can also extend combos by more hits in KH2 -- I think I got it up to five or six before I quit chaining abilities -- so there's less need to dodge things when you can just hit them continually, so long as you have a sense of timing.