Below I will list the 39 characters, SP attacks and series that were teased in the initial promotional material for the game.
Name: Arale Norimaki (則巻 アラレ)
Series: Dr. Slump (Dr. スランプ)
Era: 1980s
SP Attack: N’cha Cannon (んちゃ砲)

Name: Asta (アスタ)
Series: Black Clover (ブラッククローバー)
Era: 2010s
SP Attack: Brave Thrust (ブレイヴスラスト)

Name: Bobobōbo Bōbobo (ボボボーボ・ボーボボ)
Series: Bobobōbo Bōbobo (ボボボーボ・ボーボボ)
Era: 2000s
SP Attack: Nosehair Alley (鼻毛横丁)

Name: Dark Schneider (ダーク・シュナイダー)
Series: Bastard!!: Heavy Metal, Dark Fantasy (BASTARD!!-暗黒の破壊神)
Era: 1980s
SP Attack: Evil Blaze of Burning EXODUS! (王炎魔焦熱地獄)

Name: Son Goku (孫 悟空)
Series: Dragon Ball (ドラゴンボール)
Era: 1980s
SP Attack: Kamehameha (かめはめ波)

Name: Gon Freecss (ゴン=フリークス)
Series: Hunter x Hunter (ハンター×ハンター)
Era: 1990s
SP Attack: Jajanken – Rock (ジャジャン拳 グー)

Name: “Bossun” Yūsuke Fujisaki (藤崎 佑助)
Series: Sket Dance (スケット・ダンス)
Era: 2000s
SP Attack: Break Slingshot (ブレイクスリングショット)

Name: Hitomi Kisugi (来生 瞳)
Series: Cat’s Eye (キャッツ♥アイ)
Era: 1980s
SP Attack: Cat’s Card (キャッツ カード)

Name: “Deku” Izuku Midoriya (緑谷 出久)
Series: My Hero Academia (僕のヒーローアカデミア)
Era: 2010s
SP Attack: Detroit Smash (デトロイト・スマッシュ)

Name: Jaguar Junichi (ジャガージュン市)
Series: Pyu to Fuku! Jaguar (ピューと吹く! ジャガー)
Era: 2000s
SP Attack: Compliant Flute Attack (如意フェアタック)

Name: Jotaro Kujo (空条 承太郎)
Series: Jojo’s Bizarre Adventure (ジョジョの奇妙な冒険)
Era: 1980s
SP Attack: Ora Ora Rush (オラオララッシュ)

Name: Jun Kazami (風見 潤)
Series: Yoroshiku Mechadoc (よろしくメカドック)
Era: 1980s
SP Attack: Tool Throwing (工具投擲)

Name: Ryōtsu Kankichi (両津勘吉)
Series: “Kochikame” Kochira Katsushika-ku Kameari Kōen Mae Hashutsujo (こちら葛飾区亀有公園前派出所)
Era: 1970s
SP Attack: Rocket Launcher (ロケットランチャー)

Name: Cobra (コブラ)
Series: Cobra (コブラ)
Era: 1970s
SP Attack: Psychogun (サイコガン)

Name: Himura Kenshin (緋村 剣心)
Series: Rurouni Kenshin (るろうに剣心)
Era: 1990s
SP Attack: Amakakeru Ryū no Hirameki (天翔龍閃)

Name: Kinnikuman (キン肉マン)
Series: “Kinnikuman” Suguru Kinniku (キン肉マン)
Era: 1970s
SP Attack: Kinniku Driver (キン肉ドライバー)

Name: Kenichi Kokuhō (国宝 憲一)
Series: Moeru! Onii-san (燃える! お兄さん)
Era: 1980s
SP Attack: Onii-san Kick (お兄さんキック)

Name: Kenshiro (ケンシロウ)
Series: Fist of the North Star (北斗の拳)
Era: 1980s
SP Attack: Hokuto Hyakuretsu Ken (北斗百裂拳)

Name: Koro Sensei (殺せんせー)
Series: Assassination Classroom (暗殺教室)
Era: 2010s
SP Attack: Mach 20 (マッハ20)

Name: Kazuki Muto (武藤カズキ)
Series: Buso Renkin (武装錬金)
Era: 2000s
SP Attack: Sunlight Slasher (サンライト・スラッシャー)

Name: Light Yagami & Ryuk (夜神月 & リューク)
Series: Death Note (デスノート)
Era: 2000s
SP Attack: Shinigami Judgement (死神の断罪)

Name: Monkey D. Luffy (モンキー・D・ルフィ)
Series: One Piece (ワンピース)
Era: 1990s
SP Attack: Gomu Gomu no Gatling (ゴムゴムの銃乱打)

Name: Luckyman (ラッキーマン)
Series: Tottemo! Luckyman (とっても!ラッキーマン)
Era: 1990s
SP Attack: Lucky Beam (ラッキービーム)

Name: Keiji Maeda (前田 慶次)
Series: “Keiji” The Flowery Keiji: At the Other Side of the Clouds (花の慶次 -雲のかなたに)
Era: 1990s
SP Attack: Muso Rangeki (無双乱撃)

Name: Masaru Hananakajima (花中島 マサル)
Series: Sexy Commando Gaiden: Sugoi yo!! Masaru-san (セクシーコマンドー外伝 すごいよ!!マサルさん)
Era: 1990s
SP Attack: Delicate Punch (パンチデリカット)

Name: “Nūbē” Meisuke Nueno (鵺野 鳴介)
Series: Hell Teacher Nūbē (地獄先生ぬ〜べ〜)
Era: 1990s
SP Attack: Mysterious Power Wave (妖カ波)

Name: Rikuo Nura (奴良 リクオ)
Series: Nurarihyon no Mago (ぬらりひょんの孫)
Era: 2000s
SP Attack: Meikyou Shisui Sakura (明鏡止水 桜)

Name: Naruto Uzumaki (うずまき ナルト)
Series: Naruto (ナルト)
Era: 1990s
SP Attack: Rasengan (螺旋丸)

Name: Tatsumi Oga & Baby Beel (男鹿 辰巳 & ベル坊)
Series: Beelzebub (べるぜバブ)
Era: 2010s
SP Attack: Zebul Blast (ゼブルブラスト)

Name: Saiki Kusuo (斉木 楠雄, さいき くすお)
Series: Saiki Kusuo no Ψ-nan (斉木楠雄のΨ難)
Era: 2010s
SP Attack: ESP Energy Blast (超能力のエネルギー弾)

Name: Ichidou Rei (一堂 零)
Series: High School! Kimengumi (ハイスクール!奇面組)
Era: 1980s
SP Attack: Kimen Flash (奇面フラッシュ)

Name: Ryo Saeba (冴羽獠)
Series: City Hunter (シティーハンター)
Era: 1980s
SP Attack: One-hole Shot (ワンホールショット)

Name: Taruruuto-kun (タルるート)
Series: Magical Taruruuto-kun (まじかる☆タルるートくん)
Era: 1980s
SP Attack: Tama-chan Beam (たまちゃんびーむ)

Name: Tenten (テンテン)
Series: Hanasaka Tenshi Tenten-kun (花さか天使テンテンくん)
Era: 1990s
SP Attack: Tenten Bazooka (テンテンバズーカ)

Name: Train Heartnet (トレイン ハートネット)
Series: Black Cat (ブラック・キャット)
Era: 2000s
SP Attack: Railgun (電磁銃)

Name: Toriko (トリコ)
Series: Toriko (トリコ)
Era: 2000s
SP Attack: 10-Nail Punch (10連釘パンチ)

Name: “Wing-Man” Kenta Hirono (ウイングマン)
Series: Wing-Man (ウイングマン)
Era: 1980s
SP Attack: Driver Raid (ドライバーレイド)

Name: Yugi Muto (武藤 遊戯)
Series: Yu-Gi-Oh (遊☆戯☆王)
Era: 1990s
SP Attack: Dark Magic Attack (黒・魔・導)

Name: Fuusuke (風助)
Series: Ninku (忍空)
Era: 1990s
SP Attack: Sora-atsu ken (空圧拳)
