No, there isn’t one in English that I know of, and even then, most of what little info is posted is on kouryaku boards and in play diaries, 90% of which disappear along the sites that host them a few months after the game’s release and people have moved on. I do know Famitsu has a series of articles in how to win the game is at little turns as possible, but you’ve have to order back issues and know how to read Japanese.
If you want to try it though, here are some hints for when I attempted it:
-Before you start choose a circle of characters you want to concentrate on and organize them by what kind of support levels they can get with each other. A character than support 2 different characters in the group you’ve chosen is ideal, but not necessary, arrange it by how much it adds to their critical hit percentage, not on how much defense they have.
-Also arrange these characters in a ladder so that when you get the newer characters as the scenario goes on (you can easily win against the earlier bosses, say until chapter 12, with only 2 or 3 characters), by weapon effectiveness and range, archers are more important than you might think, despite their lack of ability to hurt most bosses. Make sure, that in any circle of at least three characters you take against the boss, at least one won’t be able to be hit either high defense, range or weapon compatibility.
-Do not attack anyone else, use all your other characters to lure away enemies, but don’t attack them. Depending on the map, either ride the chosen characters to the boss as quickly as possible (really, you should need no more than four for the entire game), or move them in support links, so their ranks look like this every time a turn ends:
And so on. Like Tetris blocks. Depending on what the terrain looks like and how fast you want characters to gain support levels.
-When you reach the boss, take out unmoving henchman, again not by attacking them, but by attacking the boss in a rotating circle of people who don’t take heavy losses from such attacks and within the range of the unmoving henchman. You’ll gain levels so quickly against the high level bosses that the henchman’s attacks will eventually make them commit a kind of suicide against you.
-Never, ever class change one of your chosen characters until they’ve reached level 20.
-Arrange all the other characters you’ve brought with one defending a choke point and all the others, ready to either rescue a chosen character and bring them around to the boss, or having healing herbs to use or pass on. For an extra challenge, don’t give them weapons at all and just healing herbs. For an extra extra challenge, don’t bring them to support your chosen characters, just play chicken with the other units to lead them around the map and keep them alive.
-Attack the boss with a weak weapon if you want to gain levels, but have each of your chosen characters attack with a rare weapon in quick succession when you actually want to kill the boss/things are getting dangerous. Since you’re only attacking the boss, you’ll have more than enough uses to last you the entire game.
That’s basically it. In order to train to try this:
-Try bringing in less units than is necessary each time, by a factor of 3 to 6 and win the map with those fewer units, without losing anyone. Doing it on normal or hard, doesn’t matter.
-Go into the multiplayer room and select units to fight against each other, making combinations of your weapons and characters until you know intimately what kinds of percentages to expect against different level differences, by neglecting characters.
-Fight at the arena as much as you can, since it involves much the same strategies.
-Go through a couple of maps without ever using any curative items, kill all your healers and charge through.
-Save at various points in the scenarios and then practice using Nils, Florina and Matthew with land mines to practice trapping enemy units into killing themselves.
By the time you get to say Chapter 19 and 20, the support levels for your chosen characters should start showing up and you’ll get some of the really powerful rare weapons, and your characters will no longer will be lacking in levels compared to the boss, often over his. It gets really easy from them on as you attack in combos and kill the boss in one turn with critical support hits.
Of course, this strategy ignores some of the principal requirements of the challenge, it was just a practice campaign that I used, but I got through the game just fine on hard this way. I’m sure you can think of quite a few strategies that might be valid, but I gave up trying on this around the time I got Ratchet & Clank and Disgaea last summer, so…
Hey! I never I had done it, just that people have. I don’t think I’ve come across any challenge movies or DVDs for this game, (you know like the ones that come with the cheap version of Shinobi?) but if I do, I’ll let you know the details.