So before I finish some secret things*cough*Mario/Wario Land stuff*cough*, here are more things from my Earthbound fangame:
Redesigned Mad Car to be a bit more car-sized relative to other enemies.
Updated some oldish sprites.
And finally...
A secret boss! Based on art! It spams PK Starstorm!
(Yes, it's going to be possible to get boss backsprites. It's just going to be extremely difficult and really only useful if you're trying to fill up the Battle Memory.)
Basically just Warp Pipes, only they all go to a set location (some sort of desert fortress), and moving the vase changes where you appear in the fortress, allowing you to access areas you otherwise wouldn't be able to.
Also, this'll be the only area where you can encounter Phantos.