Mods I would suggest you install before anything that adds content.

eggs

canon

A collection of high quality items that add to the object count. Branded items will only be included if they are culturally influential or from a previous version of Scribblenauts. This projects goal is to make Scribblenauts Unlimited feel a little bit les

Characters, locations, items, and abilities from My Hero Academia chosen by quality rather than just for existing. Pick and choose however you want.

I collection for vanilla-ish style gameplay, with other things I think fit with the game. This includes a few races.