I was thinking of doing this to. I tried, but kind of failed haha. these were some of my ideas you can gladly use!
* for the anvil, On the top put a full heart (like video game hearts) For the second, kinda of damaged anvil, make the heart half full, and for the almost broken anvil, make the heart empty.
* For the beacon, all tho this isnt nintendo, You can do the companion cube.
* For armor, you can do mario,luigi,princess peach, and daisy. (something like that)
* For the minecart, you can do a mario race car.
*for the flower pot, you can do the green tubes from Mario.
*For the xp, you can do stars, like they have in mario (Mario is prob the easiest idea to use)
*for the cactus, maybe make them into the spiky guys from mario
*For a ghast, you can do king boo.
*Villagers, you could do the little toads.
*For some mob, you can do shy guys.
*Spawn eggs can be Poke Balls.
*The Books can be scrolls, because a lot of video games would use scrolls
*again, protal isnt nintendo, but you could do the cake as the portal cake
*The dyes could be the mario power ups. Ex: The red or orange could be the flower. One of the blues could be the penguin, Yellow would be the star, antoher blue could be ice, etc.
*i dont know what, But you could use the barrles from donkey kong as something
These are some ideas ill write down some mroe fi you guys need them. hope these help!