List of Scrapped Rhythm Games

While the Rhythm Heaven Series boasts a large number of Rhythm Games, there also also many that did not make the cut. Below is a list of these scrapped games.

Rhythm Tengoku
During an interview with Hobonichi, the developers shared ideas for Rhythm Games that were not implemented in the final version of Rhythm Tengoku. It is mentioned that there are over 20 games cut from the game, which are listed below. Some games have remnants in the final game, while others were removed completely. The following games are found within the game's debug menu, and are not mentioned by the developers.
 * Shibaku (『しばく』) was a Rhythm Game where the player would press a button to swing a stick (presumably to strike something), then release it to return the stick back. However, the act of releasing the button to the rhythm was found to be unexpectedly difficult to understand, leading to the game being cut. Ninja Bodyguard in Remix 5 and Ninja no Shison show a character that slices rocks with a stick, which may have been inspired by this idea.
 * Kuma (『くま』). This game has leftover sound effects, labeled "s_kuma_hit", "s_kuma_miss" and "s_kuma_sakana" (Sakana meaning "fish"). The last of these was repurposed for Iai Giri.
 * Fighter (『ファイター』).
 * Rhythm Batting (『リズムバッティング』). This game has one leftover sound effect, labeled "s_rythm_bat_miss".
 * Awakudaki (『あわくだき』).
 * Drum Robo (『ドラムロボ』).
 * Pickupper (『ピックアッパー』).
 * Phrase (『フレーズ』).
 * Box Man (『ボックスマン』).
 * Happa (『はっぱ』).
 * Rhythm Taisō (『リズムたいそう』).
 * Rhythm Cooking (『リズムクッキング』).
 * Block (『ブロック』). This game has leftover sound effects, labeled "s_block_gotin", "s_block_hit" and "s_block_walk". The second of these was repurposed for Showtime and Sick Beats.
 * Block 2 (『ブロック２』). This game has leftover sound effects, labeled "s_block2_block" and "s_block2_fast".
 * Yurikago (『ゆりかご』). This game has leftover sound effects, labeled "s_yuri_naki" and "s_yuri_yurasi". The former was repurposed as one of the results sounds in Rhythm-kan Check.
 * Uki (『ウキ』). This game has leftover sound effects, labeled "s_uki_water1", "s_uki_water2" and "s_uki_water3".
 * Rhythm Art (『リズムアート』)
 * Heartbeat (『ハートビート』)
 * Guardman (『ガードマン』)
 * Kawasemi (『かわせみ』). This game has leftover music, labeled "s_kawasemi_bgm" and "s_kawasemi_frase".
 * Key Toy (『キートイ』). This game has leftover sound effects, labeled "s_keytoy_count1" and "s_keytoy_count2". These sound similar to the timer sound effects used in Quiz Show.
 * Rockband (『ロックバンド』).
 * Tanooki & Monkey (『たぬき＆モンキー』). This game is the only one from this group to be partially implemented, but innacessible.
 * Don to Tan no Kankei (『ドンとタンの関係』). This game has leftover sound effects, labeled "s_dontan_count" and "s_dontan_water". The former was repurposed as the cowbell noise used in Night Walk, which has since been used as a counting sound in various other games.
 * Dance Lesson 1 (ダンスレッスン　１) is an eariler version of Remix 1, where Tap Trial replaces Rhythm Datsumo and the remix itself is much longer.
 * Rhythm o Shuji 2 (リズムお習字 ２). This game is mentioned in an unused gameplay history screen in Rhythm Tengoku, accessable only through the debug menu, which lists all the games and things in the Omaku Corner, the average score the player currently has (using a numbering system from 0 to 1000 which is hidden from the player in normal gameplay), and the amount of plays. Among the games is a string for this game, however no other content exists for it.
 * Rap Women (by KAZU) (ラップ　ウィメン（ｂｙ　ＫＡＺＵ）) is a version of Rap Women which contains many more offbeats. The used version in contrast is named Rap Women (by YONE) (ラップ　ウィメン（ｂｙ　ＹＯＮＥ）) in the debug menu.
 * Metronome (メトロノーム) . Here, the player must press Ⓐ as the needle passes over the bird on the top, playing basically the same as the first test in Rhythm-kan Check. It was reworked into Mr. Upbeat in the final game.

Rhythm Heaven
There are multiple Rhythm Games referenced in the sound banks of Rhythm Heaven, with multiple sound effects, which are never used in the game.
 * Some of the voice clips in SEQARC_TAP1 and SEQARC_TAP2 where reused in Space Soccer, and later repurposed for Board Meeting, Karate Man 2 and Pajama Party in later games.
 * Curiously, Tap Troupe in Rhythm Heaven Fever has a set of unused sprites in the same artstyle as Rhythm Heaven, which may be related to this game.
 * SEQARC_EFFECT1 includes sound effects from Karateka in Rhythm Tengoku. These are different from the ones used in Karate Man.
 * There is an unused sprite (the one meant to be seen on the Endless Games menu) internally named "demo_game_passboys". The sprite itself is blank.

Rhythm Heaven Fever
There are multiple Rhythm Games referenced in the sound banks of Rhythm Heaven Fever, with multiple sound effects, which are never used in the game.
 * Seika Relay (青果リレー) is an unused and unfinished Endless Game in Minna no Rhythm Tengoku. It is only accessible in the Debug Menu, placed between Clap Trap and Basket.
 * The three games seen exclusively in Endless Remix (Basket (バスケット), Kaeru Tobi (カエル跳び) and Chameleon (カメレオン)) all have unused "standalone" versions in the debug menu. They use a standard drum beat as music (also heard in Seika Relay) and are also very simple, implying they were meant for testing. Notably, Basket has a feature where it zooms in on the basket, and then zooms out, which does not occur in Endless Remix.
 * There is unused text suggesting Chameleon was intended as an "Ⓐ + Ⓑ Test" of sorts for Rhythm Heaven Fever , similar to "Practice Flicking". The final version instead has a modified version of Rhythm-kan Check (with the third test dummied out) while Chameleon was made part of Endless Remix.

Rhythm Heaven Megamix
In the debug menu of Rhythm Heaven Megamix and through other sources, it can be seen that even more games were intended to be included, but for one reason or another were scrapped.

For reference, the names internally use a system of categorizing games, using AGB, NTR, RVL and CTR for which installment they originate from, and S, L, A for Short, Long and Arrange games. For example, The Clappy Trio is AGBパチパチ三人衆S (agb_clap_S), The Clappy Trio 2 is AGBパチパチ三人衆L (agb_clap_L) and The Snappy Trio is AGBパチパチ三人衆A (agb_clap_A). A most curious case is Monster Tennis (モンスターテニス). Unused text strings (which, curiously, only exist in Rhythm Tengoku: The Best+ Taikenhan) show it would play differently to normal Rhythm Games, somehow requiring the player to use a Wii Remote, suggesting it was a scrapped project for the Wii intended to be revived in this game. The player(s) have to use a tennis racket to fight monsters. Additionally, it would've featured four stages, several bosses and multiplayer. In the debug menu, Remixes and Gate games are after all the others. Four of these aren't available in the Japanese version's debug menu. Oddly, Quiz Show has three trials in this list but no Endless Game.
 * Ninja_3DS_icon.png AGB忍者S (agb_tono_S)
 * Flock Step_3DS_icon.png RVL鳥の大群S (rvl_birds_S)
 * Cheer Readers 3DS_icon.png RVL図書ガールズS (rvl_book_S)
 * Double Date 3DS_icon.png RVLWデートS (rvl_date_S)
 * Fork Lifter 3DS_icon.png RVLくしざしS (rvl_fork_S)
 * Board Meeting 3DS_icon.png RVL重役会議S (rvl_rotation_S)
 * Packing Pests_3DS_icon.png RVLしわけS (rvl_sort_S)
 * Micro-Row 3 icon.png RVL小さないきものA (rvl_flea_A)
 * Locked Game 3DS_icon.png CTR階段キャッチA (ctr_step_A)
 * Locked Game 3DS_icon.png CTRザ・コマンダー (ctr_commander_00)
 * Locked Game 3DS_icon.png CTRカニカニリズム (ctr_crab)
 * Locked Game 3DS_icon.png CTRハチ (ctr_hachi)
 * Locked Game 3DS_icon.png CTRパラパラパラダイス (ctr_paradise_L)
 * Locked Game 3DS_icon.png CTRモンスターテニス00 (ctr_tennis_S00)
 * Locked Game 3DS_icon.png CTRモンスターテニス01 (ctr_tennis_S01)
 * Locked Game 3DS_icon.png CTRモンスターテニス02 (ctr_tennis_S02)
 * Locked Game 3DS_icon.png CTRモンスターテニス03 (ctr_tennis_S03)
 * Locked Game 3DS_icon.png CTRモンスターテニスマルチ00 (ctr_tennis_M00)
 * Locked Game 3DS_icon.png CTRモンスターテニスマルチ01 (ctr_tennis_M01)
 * Locked Game 3DS_icon.png CTRモンスターテニスマルチ02 (ctr_tennis_M02)
 * Locked Game 3DS_icon.png CTRモンスターテニスマルチ03 (ctr_tennis_M03)
 * Forest_Remix_icon.png リミックスLED(旧バージョン) (remix_LEDOld)
 * Locked Game 3DS_icon.png リミックス実験10 (remix_Test10)
 * Locked Game 3DS_icon.png リミックス実験11 (remix_Test11)
 * Locked Game 3DS_icon.png remix_BB00
 * Locked Game 3DS_icon.png remix_BB01
 * Locked Game 3DS_icon.png remix_BB02
 * Locked Game 3DS_icon.png remix_BB03
 * Quiz 3DS_icon.png AGBクイズ（初級） (agb_quiz_00)
 * Quiz 3DS_icon.png AGBクイズ（中級） (agb_quiz_01)
 * Quiz 3DS_icon.png AGBクイズ（上級） (agb_quiz_02)