This adds 3 new blocks, 6 new drops, and 1 new tool (all based on Mario)!
Mario interacted with all these blocks using his bare hands, so to keep the tradition in Minetest all these blocks are "oddly_breakable_by_hand"
Here's a few images!
These are some pictures I took during my mod playtesting phase. The blocks don't spawn that densely in the game until you get to some serious depth (-250 or deeper). However, this playtest image does adequately show the 3 blocks that were added to the game in this mod.



TOOLS!!
I added a new Mario-flavored pick to the game. To make it, use two sticks for the handle, and any 3 Mario objects. Picture below...
The pick looks like the Raccoon Mario Feather.

DOWNLOAD!!
I uploaded this to GitHub.
Source = https://github.com/cypher-neo/minetest-mario
Download = https://github.com/cypher-neo/minetest-mario/archive/master.zip