Dude the first thing you need is the required equipment, start there. So thats Baldr sword, kite shield, plate armor, armet (basic helmet). The Knight class will not be an option unless you've got those items.
FYI, if you answer the opening questions properly, you can get a knight as a unit leader to start the game. In that way, you get all the equipment requisites out of the way right off the giddy-up.
Either way, once you've got all the basic equipment, then you just need to train your fighter so he meets the physical requirements for the knight.
Appearance: Tall guy in full armor, with a big sword and shield.
Right Hand: Baldr Sword Left Hand: Kite Shield Body: Plate Armor Head: Armet
Attacks: Front: Slash X 2 - A Middle: Slash X 1 - B Back: Slash X 1 - C
STR: 72 VIT: 67
My thoughts: Combine one part fighter and two parts beefiness and what do you get? A Knight! In essence, this guy really is nothing more fancy than an upgraded Fighter. That's not a problem if that's what you're looking for, of course... His sword hits hard and he's generally pretty fast. He's got a good mix of offensive and defensive capabilities. I suggest getting several of these, like five or six.
If there's only one problem with the Knight, it's that he's a pretty costly unit, as you can see from his listed Cost.
Sheesh Mario, down boy, down! ;) Anyway, the Knight is actually one of the easiest classes to get. Youtube.com can help you by the way with some information regarding how to get things in Ogre Battle 64, but I agree that if only there was a voice oriented faq to help you with questions... that would be cool! :]
Also, from Cyric's FAQ... *and I should add you need to follow these steps properly and thoroughly or the Knight class will not come up, although even if you match the requirements you may have to exit and re enter the menu to get the class to appear.
Right Hand: Baldr Sword Left Hand: Kite Shield Body: Plate Armor Head: Armet THE GEAR YOU NEED TO MAKE ONE
Requirements: ALI: 40-100 STR: 72 VIT: 67 STRENGTH, VITALITY and of course your ... ALIGNMENT >_> this will be the hard part, align your ... alignment with the item dupe cheat to get Scrolls of Discipline and Urn of Chaoses to know what to do.
This is a pretty easy class to unlock. :]! Any more questions please contact me, pal! :)
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