Website and data research by 101Leafy.
Battles
Devil Survivor
All 89 battles in Devil Survivor (Nintendo DS, 2009), day by day. 101Leafy researched the game. Each battle page has the map, the victory and defeat conditions, every enemy with its level, HP, MP, stats, skills, and affinities, and the skills you can crack from the team leaders. Free battles open on the map between story events.
Prologue
Day 1
WairaDay 2
LV 16–2712 enemies
Ghost QAkasakaLV 9–1224 enemies
Shiba Park (1)LV 11–1616 enemies
Ikebukuro (1)LV 13–1923 enemies
Shiba Park (2)LV 9–1415 enemies
Ikebukuro (2)LV 9–1530 enemies
Shiba Park (3)LV 12–153 enemies
Suidobashi, free battle (1)LV 2–1219 enemies
Suidobashi, free battle (2)LV 10–1818 enemies
Aoyama, free battleLV 9–1821 enemies
Kudanshita, free battleLV 7–1521 enemies
Shinjuku, free battleLV 10–1718 enemies
Day 3
LV 14–1932 enemies
WendigoIkebukuroLV 14–3024 enemies
Wendigo, 
BeldrSuidobashiLV 15–2520 enemies
WendigoShibuyaLV 18–2121 enemies
WendigoAoyamaLV 20–3019 enemies
BeldrKudanshitaLV 19–2415 enemies
Nagata-choLV 18–2415 enemies
Tokyo, free battleLV 19–2524 enemies
Shiba Park, free battle (1)LV 19–2421 enemies
Ikebukuro, free battleLV 14–1818 enemies
Shiba Park, free battle (2)LV 19–2521 enemies
Shinjuku, free battleLV 18–2018 enemies
Day 4
LV 229 enemies
SuidobashiLV 24–316 enemies
Kaido,
PazuzuShibuyaLV 25–3521 enemies
KudlakShinjukuLV 25–2815 enemies
KudanshitaLV 26–3116 enemies
Tokyo, free battleLV 25–2824 enemies
Ikebukuro, free battleLV 25–2821 enemies
Shiba Park, free battleLV 25–2818 enemies
Shibuya, free battleLV 19–2518 enemies
Nagata-cho, free battleLV 25–2818 enemies
Day 5
LV 32–3522 enemies
Nagata-choLV 28–3721 enemies
Shiba Park (Keisuke)LV 32–4513 enemies
Keisuke,
YamaShiba Park (Kaido)LV 32–4524 enemies
Kaido,PazuzuKudanshitaLV 33–4619 enemies
KudlakIkebukuroLV 28–3518 enemies
ShibuyaLV 35–393 enemies
SuidobashiLV 32–5522 enemies
Kaido,Pazuzu, 
Black FrostAkasaka, free battleLV 28–3415 enemies
Shiba Park, free battleLV 32–3718 enemies
Ueno, free battleLV 33–3715 enemies
Aoyama, free battleLV 25–3215 enemies
Shinjuku, free battleLV 32–3518 enemies
Day 6
LV 40–4618 enemies
RoppongiLV 37–4521 enemies
Nagata-choLV 39–4112 enemies
SuidobashiLV 40–4512 enemies
Shiba ParkLV 40–5019 enemies
Sage of TimeShinjukuLV 2–4710 enemies
Black FrostTokyoLV 39–5528 enemies
BelialAkasaka, free battleLV 39–4415 enemies
Aoyama, free battleLV 37–4018 enemies
Ikebukuro, free battleLV 33–3715 enemies
Shinagawa, free battleLV 39–4518 enemies
Shibuya, free battleLV 39–4718 enemies
Day 7
LV 46–6521 enemies
Gin’s route, Atsuro’s route, Kaido and Naoya’s route, Amane’s routeShinagawaLV 46–6224 enemies
Gin’s route, Atsuro’s route, Kaido and Naoya’s route, Amane’s routeAoyama (Atsuro’s route)LV 40–6230 enemies
Atsuro’s routeShinjuku (Yuzu’s route)LV 1–5429 enemies
LokiYuzu’s routeJezebelLV 44–5919 enemies
Jezebel, 
Mind AmaneGin’s route, Kaido and Naoya’s route, Amane’s routeShiba Park (Kaido and Naoya’s route)LV 40–5230 enemies
Kaido and Naoya’s routeRoppongi (Belzaboul)LV 46–6229 enemies
BelzaboulGin’s route, Atsuro’s route, Kaido and Naoya’s route, Amane’s routeTop Floor (Belberith)LV 54–6538 enemies
BelberithGin’s route, Atsuro’s route, Kaido and Naoya’s route, Amane’s routeBabel (Gin’s route)LV 52–7031 enemies
Gin’s routeBabel (Atsuro’s route)LV 52–7731 enemies
Atsuro’s routeBabel (Kaido and Naoya’s route)LV 54–7729 enemies
Babel,Beldr, Belial, Jezebel, Belzaboul, BelberithKaido and Naoya’s routeBabel (Amane’s route)LV 54–7729 enemies
Babel,Beldr, Belial, Jezebel, Belzaboul, BelberithAmane’s routeSariel (Yuzu’s route)LV 47–6220 enemies
Sariel, 
Anael, IzunaYuzu’s routeRoppongi (Kaido and Naoya’s route)LV 54–6220 enemies
Sariel, AnaelKaido and Naoya’s routeTop Floor (Amane’s route)LV 1–6419 enemies
LokiAmane’s routeShiba Park, free battleLV 46–5518 enemies
Suidobashi, free battleLV 39–4915 enemies
Roppongi, free battleLV 49–6318 enemies
Top Floor, free battleLV 52–6418 enemies
Nagata-cho, free battleLV 68–9925 enemies
LuciferUeno, free battleLV 48–5515 enemies
Unused
These battles are in the game, but no event or Tokyo menu starts them.