Secrets (ABC, carlo cart and royal shadow)

Unlock method

It's simple as ABC: obtain the ring of rings secret (Bats character)

Go to bat city map (after obtaining all stage items) and find the question mark in the map, go there and press the 3 buttons on the ground by order A then B then C. Afterwards move to the right where you will find multiple of the item "Gold ring" in a circle. Collect them all but be wary of the sun atlanteans that spawn there, you should have the secret unlocked by doing this.

Forsake victory in favour of sightseeing in Carlo Cart secret (Gyoruntin character)

In the Carlo cart stage, move to the left (opposite usual movement) until a coffin and a group of Tri-anchors (three headed dragon monster) appear, the coffin appearance took me around 45 seconds with the red death character which has +110 movement speed (no idea if speed affects arrival time), kill the Tri-anchors and you will be able to open the coffin and get the character.

Her royal shadow lies behind the 46th door secret (Rose De Infernas character)

In Astral stairs, accumulatively use the doors (the warps that send you to other areas of the map) 46 times, then you will be transported to a white coffin which you open and get the character immediately.

Cheat codes

Got them from the wiki and I will just leave those here for anyone who wants the short way out. Hoping that it won't be used....

Bats Cheat code: "whydithavetobebats"

Gyoruntin Cheat code: "blunderingfool"

Rose De Infernas Cheat code: "rescuefromtheshadows"

[thesecretm]

after checking what I wrote again it seems i missed out writing that u gotta collect those 9 gold rings to get it . u should be able to try again if ur feeling up to it and mb for not mentioning this detail + thx for pointing that out

[Dr. Bees]

I ended up using the code for the ring of rings one, but only because it kept refusing to unlock and I couldn't figure out why

[thesecretm]

nothing negative at all, you get the character totally fine plus no achievements on getting any of those 3 characters anyway, but you might have to go through the actual process for it to show that you have completed the certain secret, i'm not certain about this part.

[DrexXxacK]

is there any negativ thing for me if i use one or all of this codes? maybe no archivements?