Now with the "Growth" like item, I was thinking about what effects it could have or actually, what it is;
- Growth (In-Battle) Pickup and throw to create nettles or vines that damage an enemy @ the spot it is thrown to.
- Growth (Out-Battle) Pickup and throw to create a ladder (Many Youtubers have already pointed this out, very likely with the new ladder attacks).
- Psynergy Shield (Out-Battle) Pickup and shield yourself (Or teammates aswel, which would go nicely with the psynergy shield from GS1, where the whole party was protected) for a certain amount of time or damage?
More interesting things (Where this "Item" would be only collectable by Isaac):
- Some kind of new system for Isaac, where Isaac collects psynergies to use for his neutral B / Enhance his B moves.
- A collectable for Isaac to change the final smash.
- Some kind of different collectable that would have different effects, like shulk (Movement speed buff/Jump buff etc.)
And now that I think about it, if they implement something like this, other elements would actually get some kind of representation, besides the obvious Venus element from Isaac. So I think this would be amazing. Sakurai would not need to add other characters or trophies this way, as it will all be implemented with "items".