| Character | How to unlock
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| Big One | Accept to cooperate with the JAKQ Blitzkrieg Squad in Chapter ID 042; Big One will join your party from Chapter ID 044.
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| Bijinder* | Accept to cooperate with Kikaider 01 in Chapter ID 032, then complete Chapter ID 034 with Kikaider and/or Kikaider 01 in your party.
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| Biorider | Start the game with Kamen Rider Ichigou. Have Kamen Rider Black RX in your party for Chapter ID 090.
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| Bishoujo Kamen Poitrine | Complete hidden Chapter ID 046 (unlocked by achieving a Rate of Evil of 75% or less after the completion of the second set of scenarios).
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| Garagaranda* | Start the game with Kamen Rider Ichigou, then complete Chapter ID 004 without Kamen Rider Ichigou in your party.
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| Inazuman F | Accept to cooperate with Inazuman in Chapter ID 094; Inazuman will evolve into Inazuman Flash in Chapter ID 098.
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| Kamen Rider Black | Start the game with Kamen Rider Ichigou; Black will join your party from Chapter ID 080.
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| Kamen Rider Black RX | Start the game with Kamen Rider Ichigou; Black will evolve into Black RX in Chapter ID 088.
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| Kamen Rider Nigou | Start the game with Kamen Rider Ichigou; Nigou will join your party from Chapter ID 006.
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| Kamen Rider ZX | Complete hidden Chapter ID 048 (unlocked by achieving a Rate of Evil of 47% or less after the completion of the fourth set of scenarios).
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| Kujira Kaijin* | Start the game with Kamen Rider Ichigou, then complete Chapter ID 083 with Kamen Rider Black in your party.
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| Machine Man | Complete hidden Chapter ID 116 (unlocked by achieving a Rate of Evil of 58% or less after the completion of the third set of scenarios).
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| Mogura Juujin* | Accept to cooperate with Kamen Rider Amazon in Chapter ID 075, then complete Chapter ID 076 with Amazon in your party and choose to help Mogura.
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| Power-up K | Accept to cooperate with Robot Detective K in Chapter ID 028, then complete Chapter ID 030 with K in your party.
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| Riderman | Accept to cooperate with Kamen Rider V3 in Chapter ID 007, then complete Chapter ID 011 and don't have Riderman board the rocket during the mission.
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| Robocon | Complete hidden Chapter ID 047 (unlocked by achieving a Rate of Evil of 85% or less after the completion of the first set of scenarios).
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| Roborider | Start the game with Kamen Rider Ichigou. Have Kamen Rider Black RX in your party for Chapter ID 089.
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| Rose Bambara* | Accept to cooperate with Inazuman in Chapter ID 094, then complete Chapter ID 095 with Sanagiman in your party.
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| Shadowmoon* | Start the game with Kamen Rider Ichigou. In Chapter ID 084, don't pick up the Satan Saber; Shadowmoon will join your party from Chapter ID 088.
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| Tsukinowa | Accept to cooperate with Henshin Ninja Arashi in Chapter ID 018, then complete Chapter ID 022 without Arashi in your party.
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| Walder* | Accept to cooperate with Kikaider 01 in Chapter ID 032, then complete Chapter ID 036 with Kikaider and/or Kikaider 01 in your party.
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