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Sokkō Seitokai: Sonic Council / 速攻生徒会
2D Conventional Gameplay
Sims (Banpresto)
Tags
high_school
Sims (Banpresto) Games
Fighters
Ai Honda
Playable Character Saturn
Alternate "dark" version unlocked after beating Story mode with Shibata, then selected by pressing Start on Ai.
Portrayed By Ai Orikasa
Shibata
Boss Character Saturn
Unlocked by beating Story mode with five different characters.
Portrayed By Akio Otsuka
Long-running Japanese game magazine Gamest was involved somehow with the development of Sonic Council. Whether in a design capacity, consultation, or simply name recognition is unknown.

Gamest would often publish win-loss charts for popular fighting games, and Sonic Council contains a built-in win-loss tracker where you can actually load Gamest's data.

Referring to the chart, I assume "???" is the game's boss, Shibata. Six rows down sitting at 44 is Rika, but other than that the names are anybody's guess.