I do a lot of coding for geckocodes.org so I know the code does not exist. It would only be a simple meaning of using the selection screen of the first characters availiable aka Mario and Kirby. By subspace do you mean the "subspace" or just the whole SSE. If just the subspace a simple able to select the same character code could work. Still that code must be created. Thanks for the idea. I can make that for you. Just say the word and i'll get on it as soon as I can (might be a bit though. School and stuff).
By SSE, I mean any level in Adventure mode. Like how once you beat the game, you're able to choose any character you've found, but you usually have to choose 4 for one level. I'd like it so that you only need to choose one.
But you know what I mean, I'm sure. And thanks a ton for doing this! You can start whenever you see fit.