Having the Godzilla cycling cards all work slightly differently is going to lead to a lot of judge calls, so read yours carefully to make sure you're not the one getting a match loss
Each of them corresponds to one of the planets in our solar system at the time of the manga's first release (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto) but also includes the sun

Sort Card Type Froakie #12Common $0.57 Froakie #39Common $0.36 Froakie #46Common $0.23 Froakie #38Common $0.18 Froakie #51Common $0.23 Froakie #SV11Shiny Holo Rare $9.19 Froakie #XY3Promo $2.49 Froakie #56Common $0.16 Froakie #56Common $0.28 Froakie #39Common $0.18 Froakie #23Common $0.20 Froakie #12Common $1.25 Froakie #24None Froakie #33None $2.23 Froakie #27Common $2.19 Froakie #6Common $8.45 Froakie #19Common $1.62 Froakie - 017/094 #17Common Froakie - 018/094 #18Common $5.00 Froakie - 020/083 #20Common $0.18 Froakie - 020/086 #20Common $0.17 Froakie - 031/150 #31None $0.24 Froakie - 056/197 (Cosmos Holo) #56Promo $0.78 Froakie - 086/083 #86Art Rare $5.36 Froakie - 088/086 #88Illustration Rare $12.22 Froakie - 171/150 #171Shiny Rare Froakie - 2016 (Cody Walinski) #38Common $2.95 Froakie - 22/25 #22Promo $0.45 Froakie - 4/12 #4Promo $10.16 Froakie - XY03 #XY3Promo $8.95 Froakie - XY138 #XY138Promo $4.44 Froakie (21) #21Common $0.28 Froakie (22) #22Common $0.29 Froakie - 088/086 #88Illustration Rare $12.22 Froakie - 4/12 #4Promo $10.16 Froakie #SV11Shiny Holo Rare $9.19 Froakie - XY03 #XY3Promo $8.95 Froakie #6Common $8.45 Froakie - 086/083 #86Art Rare $5.36 Froakie - 018/094 #18Common $5.00 Froakie - XY138 #XY138Promo $4.44 Froakie - 2016 (Cody Walinski) #38Common $2.95

Multicolor Inevitable Defeat Probably not good enough for three color, but interesting in the way Esper Pixie has shown with Hopeless Nightmare, where the ability to interact with an opponent while taking out chunks of their life can be something you can build around
Obtaining a sealed box of Shadowless cards is quite challenging and can only be guaranteed by opening a case and one of the boxes within it