This one is about corrupted childhood figures, the undead, massacre to sustain one's self and the experiment vs scientist dynamic. I don't think this is the best matchup for both but i really like it and think it has really good fight potential.

Tinky Winky would get

-Slendytubbies 1-3

-Slendytubbies 2d

-Slendytubbies 0

-Slendytubbies World

Springtrap would get

-The main FNAF games

-Charlie novels

-Fazbear's Fright

-Dead By Daylight (However he doesn't get Entity scaling for a couple of reasons)