Hyoru's post in Can't put skills on Oboro was marked as the answer
August 22, 2016
Check your db/pre-re or re/skill_db.txt
Should have:
//****
// Kagerou & Oboro
3001,0,6,4,0,0,0,1,1,no,0,0,0,none,0,0x4, KO_YAMIKUMO,Shadow Hiding
3002,0,0,0,0,0,0,5,0,no,0,0,0,weapon,0,0x0, KO_RIGHT,Right Hand Mastery
3003,0,0,0,0,0,0,5,0,no,0,0,0,weapon,0,0x0, KO_LEFT,Left Hand Mastery
3004,3:4:5:6:7,8,1,-1,0,0,5,-2,no,0,0,0,weapon,0,0x0, KO_JYUMONJIKIRI,Cross Slash
3005,2,6,1,-1,0,0,5,1,no,0,0,0,weapon,0,0x0, KO_SETSUDAN,Soul Cutter
3006,7:8:9:10:11,6,2,-1,0x42,2,5,1,no,0,0,0,weapon,0,0x0, KO_BAKURETSU,Kunai Explosion
3007,0,6,4,-1,0x42,4:4:4:4:5,5,1,no,0,0,0,weapon,0,0x0, KO_HAPPOKUNAI,Kunai Splash
3008,11,8,2,0,0x56,1:1:1:1:1:1:1:1:1:2,10,-10,no,0,0,0,misc,0,0x0, KO_MUCHANAGE,Rapid Throw
3009,9:10:11:12:13,8,2,-1,0x2,3,5,-5,no,0,0,0,weapon,0,0x0, KO_HUUMARANKA,Swirling Petal
3010,3,6,4,0,0x52,0,5,1,no,0,0x80,0,weapon,0,0x10, KO_MAKIBISHI,Makibishi
3011,0,6,4,0,0x1,0,5,0,yes,0,0,0,none,0,0x0, KO_MEIKYOUSISUI,Pure Soul
3012,0,6,4,0,0x1,0,5,0,no,0,0,1,none,3:4:5:6:7,0x0, KO_ZANZOU,Illusion - Shadow
3013,5,6,1,0,0x1,0,5,0,no,0,0,0,none,0,0x0, KO_KYOUGAKU,Illusion - Shock
3014,5,6,1,0,0x1,0,5,0,no,0,0,0,none,0,0x0, KO_JYUSATSU,Illusion - Death
3015,0,6,4,3,0x1,0,1,1,no,0,0,0,none,0,0x0, KO_KAHU_ENTEN,Fire Charm
3016,0,6,4,1,0x1,0,1,1,no,0,0,0,none,0,0x0, KO_HYOUHU_HUBUKI,Ice Charm
3017,0,6,4,4,0x1,0,1,1,no,0,0,0,none,0,0x0, KO_KAZEHU_SEIRAN,Wind Charm
3018,0,6,4,2,0x1,0,1,1,no,0,0,0,none,0,0x0, KO_DOHU_KOUKAI,Earth Charm
3019,11,6,1,0,0,0,1,1,no,0,0,0,magic,0,0x0, KO_KAIHOU,Release Ninja Spell
3020,7,6,2,0,0,0,1,1,yes,0,0,0,magic,0,0x0, KO_ZENKAI,Cast Ninja Spell
3021,5:6:7:8:9,6,16,0,0x1,0,5,1,no,0,0,0,none,0,0x0, KO_GENWAKU,Illusion - Bewitch
3022,0,6,4,0,0x1,0,5,0,no,0,0,0,none,0,0x0, KO_IZAYOI,16th Night
3023,0,6,4,0,0x3,2:3:4:5:6,5,0,no,0,0,0,none,0,0x0, KG_KAGEHUMI,Shadow Trampling
3024,7,6,1,0,0x1,0,5,1,no,0,0,0,none,0,0x0, KG_KYOMU,Empty Shadow
3025,7,6,16,0,0x1,0,5,1,no,0,0,0,none,0,0x0, KG_KAGEMUSYA,Shadow Warrior
3026,7,6,16,0,0x1,0,5,1,no,0,0,0,none,0,0x0, OB_ZANGETSU,Distorted Crescent
3027,7,6,16,0,0x1,0,5,1,no,0,0,0,none,0,0x0, OB_OBOROGENSOU,Moonlight Fantasy
3028,1,6,4,0,0x2,3,1,1,no,0,0,0,weapon,0,0x0, OB_OBOROGENSOU_TRANSITION_ATK,Moonlight Fantasy Transition Attack
3029,7,6,1,0,0x1,0,5,0,no,0,0,0,none,0,0x0, OB_AKAITSUKI,Ominous Moonlight
Or skill_tree.txt:
//Kagerou
4211,1,9,0,0,0,0,0,0,0,0,0,0 //NV_BASIC#Basic Skill#
4211,142,1,0,0,0,0,0,0,0,0,0,0 //NV_FIRSTAID#First Aid#
4211,522,10,0,0,0,0,0,0,0,0,0,0 //NJ_TOBIDOUGU#NJ_TOBIDOUGU#
4211,523,10,522,1,0,0,0,0,0,0,0,0 //NJ_SYURIKEN#NJ_SYURIKEN#
4211,524,5,523,5,0,0,0,0,0,0,0,0 //NJ_KUNAI#NJ_KUNAI#
4211,525,5,522,5,524,5,0,0,0,0,0,0 //NJ_HUUMA#NJ_HUUMA#
4211,526,10,522,10,525,5,0,0,0,0,0,0 //NJ_ZENYNAGE#NJ_ZENYNAGE#
4211,527,5,0,0,0,0,0,0,0,0,0,0 //NJ_TATAMIGAESHI#NJ_TATAMIGAESHI#
4211,528,10,529,1,0,0,0,0,0,0,0,0 //NJ_KASUMIKIRI#NJ_KASUMIKIRI#
4211,529,5,527,1,0,0,0,0,0,0,0,0 //NJ_SHADOWJUMP#NJ_SHADOWJUMP#
4211,530,5,528,5,0,0,0,0,0,0,0,0 //NJ_KIRIKAGE#NJ_KIRIKAGE#
4211,531,5,529,5,0,0,0,0,0,0,0,0 //NJ_UTSUSEMI#NJ_UTSUSEMI#
4211,532,10,531,4,530,3,543,1,0,0,0,0 //NJ_BUNSINJYUTSU#NJ_BUNSINJYUTSU#
4211,533,10,0,0,0,0,0,0,0,0,0,0 //NJ_NINPOU#NJ_NINPOU#
4211,534,10,533,1,0,0,0,0,0,0,0,0 //NJ_KOUENKA#NJ_KOUENKA#
4211,535,10,534,5,0,0,0,0,0,0,0,0 //NJ_KAENSIN#NJ_KAENSIN#
4211,536,5,533,10,535,7,0,0,0,0,0,0 //NJ_BAKUENRYU#NJ_BAKUENRYU#
4211,537,10,533,1,0,0,0,0,0,0,0,0 //NJ_HYOUSENSOU#NJ_HYOUSENSOU#
4211,538,10,537,5,0,0,0,0,0,0,0,0 //NJ_SUITON#NJ_SUITON#
4211,539,5,533,10,538,7,0,0,0,0,0,0 //NJ_HYOUSYOURAKU#NJ_HYOUSYOURAKU#
4211,540,10,533,1,0,0,0,0,0,0,0,0 //NJ_HUUJIN#NJ_HUUJIN#
4211,541,5,540,5,0,0,0,0,0,0,0,0 //NJ_RAIGEKISAI#NJ_RAIGEKISAI#
4211,542,5,533,10,541,5,0,0,0,0,0,0 //NJ_KAMAITACHI#NJ_KAMAITACHI#
4211,543,5,533,5,0,0,0,0,0,0,0,0 //NJ_NEN#NJ_NEN#
4211,544,10,522,7,530,5,543,1,0,0,0,0 //NJ_ISSEN#NJ_ISSEN#
4211,410,1,0,0,0,0,0,0,0,0,0,0 //WE_CALLBABY#Call Baby#
4211,3001,1,530,5,0,0,0,0,0,0,0,0 //KO_YAMIKUMO##
4211,3002,5,0,0,0,0,0,0,0,0,0,0 //KO_RIGHT##
4211,3003,5,0,0,0,0,0,0,0,0,0,0 //KO_LEFT##
4211,3004,5,3001,1,0,0,0,0,0,0,0,0 //KO_JYUMONJIKIRI##
4211,3005,5,3004,2,0,0,0,0,0,0,0,0 //KO_SETSUDAN##
4211,3006,5,524,5,0,0,0,0,0,0,0,0 //KO_BAKURETSU##
4211,3007,5,3006,1,0,0,0,0,0,0,0,0 //KO_HAPPOKUNAI##
4211,3008,10,3010,3,0,0,0,0,0,0,0,0 //KO_MUCHANAGE##
4211,3009,5,525,5,0,0,0,0,0,0,0,0 //KO_HUUMARANKA##
4211,3010,5,526,1,0,0,0,0,0,0,0,0 //KO_MAKIBISHI##
4211,3011,5,533,10,0,0,0,0,0,0,0,0 //KO_MEIKYOUSISUI##
4211,3012,5,531,1,0,0,0,0,0,0,0,0 //KO_ZANZOU##
4211,3013,5,3021,2,0,0,0,0,0,0,0,0 //KO_KYOUGAKU##
4211,3014,5,3013,3,0,0,0,0,0,0,0,0 //KO_JYUSATSU##
4211,3015,1,0,0,0,0,0,0,0,0,0,0 //KO_KAHU_ENTEN##
4211,3016,1,0,0,0,0,0,0,0,0,0,0 //KO_HYOUHU_HUBUKI##
4211,3017,1,0,0,0,0,0,0,0,0,0,0 //KO_KAZEHU_SEIRAN##
4211,3018,1,0,0,0,0,0,0,0,0,0,0 //KO_DOHU_KOUKAI##
4211,3019,1,3015,1,3016,1,3017,1,3018,1,0,0 //KO_KAIHOU##
4211,3020,1,3019,1,3022,1,0,0,0,0,0,0 //KO_ZENKAI##
4211,3021,5,531,1,0,0,0,0,0,0,0,0 //KO_GENWAKU##
4211,3022,5,533,5,0,0,0,0,0,0,0,0 //KO_IZAYOI##
4211,3023,5,3012,1,0,0,0,0,0,0,0,0 //KG_KAGEHUMI##
4211,3024,5,3023,2,0,0,0,0,0,0,0,0 //KG_KYOMU##
4211,3025,5,3024,3,0,0,0,0,0,0,0,0 //KG_KAGEMUSYA##
//Oboro
4212,1,9,0,0,0,0,0,0,0,0,0,0 //NV_BASIC#Basic Skill#
4212,142,1,0,0,0,0,0,0,0,0,0,0 //NV_FIRSTAID#First Aid#
4212,522,10,0,0,0,0,0,0,0,0,0,0 //NJ_TOBIDOUGU#NJ_TOBIDOUGU#
4212,523,10,522,1,0,0,0,0,0,0,0,0 //NJ_SYURIKEN#NJ_SYURIKEN#
4212,524,5,523,5,0,0,0,0,0,0,0,0 //NJ_KUNAI#NJ_KUNAI#
4212,525,5,522,5,524,5,0,0,0,0,0,0 //NJ_HUUMA#NJ_HUUMA#
4212,526,10,522,10,525,5,0,0,0,0,0,0 //NJ_ZENYNAGE#NJ_ZENYNAGE#
4212,527,5,0,0,0,0,0,0,0,0,0,0 //NJ_TATAMIGAESHI#NJ_TATAMIGAESHI#
4212,528,10,529,1,0,0,0,0,0,0,0,0 //NJ_KASUMIKIRI#NJ_KASUMIKIRI#
4212,529,5,527,1,0,0,0,0,0,0,0,0 //NJ_SHADOWJUMP#NJ_SHADOWJUMP#
4212,530,5,528,5,0,0,0,0,0,0,0,0 //NJ_KIRIKAGE#NJ_KIRIKAGE#
4212,531,5,529,5,0,0,0,0,0,0,0,0 //NJ_UTSUSEMI#NJ_UTSUSEMI#
4212,532,10,531,4,530,3,543,1,0,0,0,0 //NJ_BUNSINJYUTSU#NJ_BUNSINJYUTSU#
4212,533,10,0,0,0,0,0,0,0,0,0,0 //NJ_NINPOU#NJ_NINPOU#
4212,534,10,533,1,0,0,0,0,0,0,0,0 //NJ_KOUENKA#NJ_KOUENKA#
4212,535,10,534,5,0,0,0,0,0,0,0,0 //NJ_KAENSIN#NJ_KAENSIN#
4212,536,5,533,10,535,7,0,0,0,0,0,0 //NJ_BAKUENRYU#NJ_BAKUENRYU#
4212,537,10,533,1,0,0,0,0,0,0,0,0 //NJ_HYOUSENSOU#NJ_HYOUSENSOU#
4212,538,10,537,5,0,0,0,0,0,0,0,0 //NJ_SUITON#NJ_SUITON#
4212,539,5,533,10,538,7,0,0,0,0,0,0 //NJ_HYOUSYOURAKU#NJ_HYOUSYOURAKU#
4212,540,10,533,1,0,0,0,0,0,0,0,0 //NJ_HUUJIN#NJ_HUUJIN#
4212,541,5,540,5,0,0,0,0,0,0,0,0 //NJ_RAIGEKISAI#NJ_RAIGEKISAI#
4212,542,5,533,10,541,5,0,0,0,0,0,0 //NJ_KAMAITACHI#NJ_KAMAITACHI#
4212,543,5,533,5,0,0,0,0,0,0,0,0 //NJ_NEN#NJ_NEN#
4212,544,10,522,7,530,5,543,1,0,0,0,0 //NJ_ISSEN#NJ_ISSEN#
4212,410,1,0,0,0,0,0,0,0,0,0,0 //WE_CALLBABY#Call Baby#
4212,3001,1,530,5,0,0,0,0,0,0,0,0 //KO_YAMIKUMO##
4212,3002,5,0,0,0,0,0,0,0,0,0,0 //KO_RIGHT##
4212,3003,5,0,0,0,0,0,0,0,0,0,0 //KO_LEFT##
4212,3004,5,3001,1,0,0,0,0,0,0,0,0 //KO_JYUMONJIKIRI##
4212,3005,5,3004,2,0,0,0,0,0,0,0,0 //KO_SETSUDAN##
4212,3006,5,524,5,0,0,0,0,0,0,0,0 //KO_BAKURETSU##
4212,3007,5,3006,1,0,0,0,0,0,0,0,0 //KO_HAPPOKUNAI##
4212,3008,10,3010,3,0,0,0,0,0,0,0,0 //KO_MUCHANAGE##
4212,3009,5,525,5,0,0,0,0,0,0,0,0 //KO_HUUMARANKA##
4212,3010,5,526,1,0,0,0,0,0,0,0,0 //KO_MAKIBISHI##
4212,3011,5,533,10,0,0,0,0,0,0,0,0 //KO_MEIKYOUSISUI##
4212,3012,5,531,1,0,0,0,0,0,0,0,0 //KO_ZANZOU##
4212,3013,5,3021,2,0,0,0,0,0,0,0,0 //KO_KYOUGAKU##
4212,3014,5,3013,3,0,0,0,0,0,0,0,0 //KO_JYUSATSU##
4212,3015,1,0,0,0,0,0,0,0,0,0,0 //KO_KAHU_ENTEN##
4212,3016,1,0,0,0,0,0,0,0,0,0,0 //KO_HYOUHU_HUBUKI##
4212,3017,1,0,0,0,0,0,0,0,0,0,0 //KO_KAZEHU_SEIRAN##
4212,3018,1,0,0,0,0,0,0,0,0,0,0 //KO_DOHU_KOUKAI##
4212,3019,1,3015,1,3016,1,3017,1,3018,1,0,0 //KO_KAIHOU##
4212,3020,1,3019,1,3022,1,0,0,0,0,0,0 //KO_ZENKAI##
4212,3021,5,531,1,0,0,0,0,0,0,0,0 //KO_GENWAKU##
4212,3022,5,533,5,0,0,0,0,0,0,0,0 //KO_IZAYOI##
4212,3026,5,3021,1,0,0,0,0,0,0,0,0 //OB_ZANGETSU##
4212,3027,5,3029,3,0,0,0,0,0,0,0,0 //OB_OBOROGENSOU##
4212,3029,5,3026,2,0,0,0,0,0,0,0,0 //OB_AKAITSUKI##