Warning
The unregistered island that Zell calls "Battle Island" needs steam to get through several doors, and quite a lot at the bottom too. Most readers should already know that, and also know a way of getting out of paying a good amount of steam at the last steam door is to leave things to Zell. However, doing so creates unavoidable fights on each level that keep coming back every time you come back to the area until Ultima is dead. While good for EXP, this could get annoying - you can't even avoid them through ENC-NONE, a Diablos ability, and can't run. Often bad news against the Ruby Dragons especially. So, it may be worth paying out for steam here and 1 on each of the levels, to get to the bottom without a single battle (using the ENC-NONE ability).
Also, using Siren's MOVE-FIND ability near the bottom reveals an Ultima drawpoint and a save point much closer to the winch. I hope I helped those who know what I'm on about.
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