In this battle, any specific equipment beyond Blood Blade or Chainsaw Blade(I used the first one, as it automatically healed Matt if he was the one hit in previous turn, which means another attack from Anna - remember, no-element weapon if you want her to attack as well) has absolutely no meaning, you can choose whatever you want. The boss will always hit you and always bring you down to 1 HP, so defence and evade don't matter, I choose to maximize Matt's damage. If you can't kill the small enemies in a single turn(Wind Slash or Wind Slash + Meteor Shower) every time, it's best to level up a bit and then try again; the battle is MUCH harder if anything more than just boss attacks you.
Have the the third person attack the boss with some no-elemental weapon/skill and re-Beer Matt from time to time. Or, as I did, have Anna as the third character and have her heal the victim and Natz self-buff magic on the second turn(first one is used summoning Kitten Fort) and then spam Lucky Star/Meteor Shower until the battle ends.
About the secret boss: there actually is nothing more needed than what already is in the walkthrough. Personally I used Matt with Blood Blade and Wind Slash, Natz for healing and Meteor Shower/Lucky Star. On the first turn have Natz or third character use Kitten Fort(you get it from a quest in the jungle, 3rd zone to the right, 4th down, counting from the left top corner of the map) to give Morale to the party(should last about 5 turns, no more is needed) and the other character use Beer on Matt. Have Matt use Wind Slash on his EVERY turn from now, if done correctly you will have only the boss attack you, the little ones will be killed in one turn by Wind Slash and re-killed each turn when they are summoned by the boss. Use Natz to heal whoever gets attacked by the boss(with Morale active, they should survive at 1 HP, but you need to heal them immediately for Morale to work on the next turn - just in case boss hits the same person again).
@kerub - I think you will need a lot more time... It's in some chest in the last town beach/desert area, if I remember correctly either in the lower left "sand" screen, or one of the only two sea + wood platforms screens at the very top of the map.
Blackdragon: I mean the ones BELOW those listed by me. I have blank spaces in some categories in Forge menu, between the items I already got and the premium ones(only in 4 categories, in others it is item after item after item, without any empty room there; the last one missing is the last flair in the first flair page). There are exactly 5 such spaces, and I have 5 items less total from the high scores. Many people have exactly 174 items, so I assume that's the correct maximum, not some hackers.
Anyways, I would really be glad if someone answered my question, posted around 6 or 7 comments below... In short: all 295 chests opened, all quests done, all medals but the "3rd time finished game" earned, premim bought, and still 169/174 equips :( below I have listed which ones are missing. Thanks for help, anyone.
After you get to the third and final town, you can open the back entrance to the factory(switch 10), then mess around with the switches inside it (collect a single battery, you will need it) until all except for 1 and 2 are set correctly(on the top right room of the factory there is a wall near the middle of the sreen showing you which switches need to be turned on; the rest have to be turned off). After all switches aside from 1 and 2 are set correctly, exit the factory(either a slime bunny or top exit), walk aaaaallll the way around, set the battery next to the door you used to enter the factory for the first time, enter the factory(sorry, I don't remember through which door :( either the one just opened or the one on a screen one down, one right from you), adjust the switches 1 and 2, walk out through the first door ever opened and use a slime to warp to the inside of the factory. Go to the top right room, and search in the mess behind the now open DANGER door.
I have absolutely no idea what is missing... I have opened 295 chests, found 67 secrets, done all quests, have all medals except 3mil damage and 3rd time finished game, and I still only have 169 equips. That's what Encyclopedia/Game shows and if counted one by one, so it's not some script counting mistake... I have empty spaces under Officer's Hat, Army Jacket, Cow Horns, Camo Skirt and Broccoli Sticker. Could anyone explain it to me?... Plus, what is with those Godcat weapons drops? 0% drop chance by an unkillable foe? Seriously? Something not gettable, out there just to tease us, or is there a way to get them? ;)
I have absolutely no idea what is missing... I have opened 295 chests, found 67 secrets, done all quests, have all medals except 3mil damage and 3rd time finished game, and I still only have 169 equips. That's what Encyclopedia/Game shows and if counted one by one, so it's not some script counting mistake... I have empty spaces under Officer's Hat, Army Jacket, Cow Horns, Camo Skirt and Broccoli Sticker. Could anyone explain it to me?... Plus, what is with those Godcat weapons drops? 0% drop chance by an unkillable foe?... Something not gettable, out there just to tease us, or is there a way to get them?
Max HP/MP doesn't show anymore during battle above 99999/999... Could you change it so it is still displayed, but maybe in a bit smaller font that it used to be? Right now the part " /(max hp or mp)" is set to disappear, so maybe it wouldn't be that hard to change it to smaller font, not disappearing?
Toxic squid doesn't lower my accuracy with that dark smoke attack like in the description(it even gets commented on by Anna that "it suddenly got dark in here", or something like that), berserks characters instead.