Strange thing is that none of them has registers at $5207, $5208, $5209, $520A ($5208 always return $FF - probably open BUS and does not reacts for writes for $5207). There is also no M2 clock timer at $5209-$520a (they return $FF too). I even cut CL3 jumper on one of them and it did not change anything.
I briefly analyzed my and botgod's database and it looks like MMC5 is newer and they started releasing it between 9129-9136 and Just Breed is the game which should contain it with highest probability.
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8950AA089 MMC5 Suikoden: Tenmei no Chikai
8950AA105 MMC5 Suikoden: Tenmei no Chikai
8950AA108 MMC5 Nobunaga no Yabou: Sengoku Gunyuuden
9005AA048 MMC5 Uchuu Keibitai SDF
9006AA020 MMC5 Castlevania III: Dracula's Curse (USA)
9006AA029 MMC5 Bandit Kings of Ancient China
9008AA090 MMC5 Castlevania III: Dracula's Curse (USA)
9009AA046 MMC5 Suikoden: Tenmei no Chikai
9010AA017 MMC5 Suikoden: Tenmei no Chikai
9011AA045 MMC5 Sangokushi II
9026AA013 MMC5 Castlevania III: Dracula's Curse (USA)
9027AA024 MMC5 Ishin no Arashi
9032AA002 MMC5 Sangokushi II
9037AA033 MMC5 Sangokushi II
9042AA019 MMC5 Gunsight
9042AA025 MMC5 Nobunaga's Ambition II
9043AA001 MMC5 Daikoukai Jidai
9045AA018 MMC5 Castlevania III: Dracula's Curse (USA)
9046AA026 MMC5 Sangokushi II
9107AA013 MMC5 Romance of the Three Kingdoms II
9107AA024 MMC5 Romance of the Three Kingdoms II
9113AA024 MMC5 Shin 4 Nin Uchi Mahjong: Yakuman Tengoku
9114AA048 MMC5 L'Empereur (JPN)
9116AA003 MMC5 Laser Invasion
9117AA017 MMC5 Shin 4 Nin Uchi Mahjong: Yakuman Tengoku
9122AA019 MMC5 L'Empereur (USA)
9122AA020 MMC5 Nobunaga no Yabou: Bushou Fuuunroku
9122AA042 MMC5 Just Breed
9123AA002 MMC5 Castlevania III: Dracula's Curse (FRG)
9123AA012 MMC5 Castlevania III: Dracula's Curse (SCN)
9123AA043 MMC5 Gemfire
9126AA004 MMC5 Castlevania III: Dracula's Curse (SCN)
9126AA012 MMC5 Castlevania III: Dracula's Curse (SCN)
9126AA023 MMC5 Royal Blood
9128AA012 MMC5 Metal Slader Glory
9128AA013 MMC5 Uncharted Waters
9136BA026 MMC5A Just Breed
91378A013 MMC5A Just Breed
9141BA014 MMC5A Aoki Ookami to Shiroki Mejika: Genchou Hishi
9141BA020 MMC5A Just Breed