The battle to get to Sephiroth is doable, if lengthy -- it's just rounds and rounds of Coliseum battle. Sephiroth is damn near impossible. I got all the way there once, to see his intro and judge the new CG model, then pretty much resigned myself to dying miserably.
An optional Sephiroth battle also exists in KH2. You'll stumble onto it pretty much naturally if you're in the habit of revisiting everywhere you've been after major plot-bits. The optional battle is harder in KH2, as judged by the fact that I survived through about half of Sephiroth's HP in KH, and I survived about twenty-five seconds in KH2. If you want the bonus ending video for 100% complete, you must win all optional challenges in Normal Mode -OR- replay the plot, but not all the optional bits, in Proud Mode, which becomes available after you complete the game the first time. The second is substantially easier, although possibly more time-consuming.
I have to say, though, that KH2 actually manages to be prettier than KH. I didn't think it was possible. Save one world that I felt dipped a bit far into the Uncanny Valley, the whole thing was visually impressive from start to finish. The tendency to slash also does not diminish in the slightest. ^_^
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An optional Sephiroth battle also exists in KH2. You'll stumble onto it pretty much naturally if you're in the habit of revisiting everywhere you've been after major plot-bits. The optional battle is harder in KH2, as judged by the fact that I survived through about half of Sephiroth's HP in KH, and I survived about twenty-five seconds in KH2. If you want the bonus ending video for 100% complete, you must win all optional challenges in Normal Mode -OR- replay the plot, but not all the optional bits, in Proud Mode, which becomes available after you complete the game the first time. The second is substantially easier, although possibly more time-consuming.
I have to say, though, that KH2 actually manages to be prettier than KH. I didn't think it was possible. Save one world that I felt dipped a bit far into the Uncanny Valley, the whole thing was visually impressive from start to finish. The tendency to slash also does not diminish in the slightest. ^_^