Okay, OOO henshin system, I just tried out something, and just wanted to share.
So, all you have to do is to change the middle (torso) coin, then use a heavy attack the system will handle the rest, and if you want to stay in the random combo that you like, stick to light attacks and special, the heavy attack will change you into one of the 3 combo (Gata-Kiri-Ba, Ra-Tora-Tah, Sa-Go-Zo) based on whatever coin you have on your torso
-Ouja only has Genocider Deck (although they have summon select screens, he wont use it to select summons, only DiEnd can select summons at that screen)
Genocider deck is overall better; comes with extra weapon and with gameplay-unique Advent. Venosnaker advent would be just another projectile attack. And if they included 2 decks to choose from, everyone would probably use Genocider deck still.
It missed Swing Vent in PSX game too (in Genocider deck, not the Ouja Raia deck); Ouja never used that card in show too so I doubt we will ever see it.
Guide work in progress:
-All character sections have all the imagery (rider gear, actor portraits), and stats listed. I actually managed to find good-looking artwork/photos for everyone. Everyone has placeholders for normals/specials; All riders (aside of Den-O,Kiva,Decade,and first 10 forms of Double) have translated names of specials / form changes / supers, as well as meter cost listed already.
-Story preface from every rider TV series is there already and there are placeholders to input info about rider system / riders for each as well (is needed because KR isnt very known and there will be people playing this game who have no clue what all these "rangers" how they call them, are).
-There are already misc. notes/ combos for few characters here and there.
-No writeup for controls setup and Ragnarok Mode/unlocks yet