This looks like a variant puzzle but except for the cell values used there is nothing exotic about the puzzle itself - it has a unique solution under the standard Sudoku rules, i.e. each row/column/box has exactly one each from a set of 9 cell values. Everyone should see why I picked such a set of values if they look at the puzzle pic from multiple angles. In fact the name "Down Under Upside Down" has 3 layers of meanings - kudos to anyone who can figure out all 3.

The difficulty isn't anything special compared to the festival creatures, the metallic thingies or the new witchy-mirage-illusion crackers. However, if you're smart enough you can solve this one using very elegant simple moves, without any chain/ALS etc. In fact all the required tricks have been discussed in this forum in the past, but it's a matter of whether you guys really want to learn them.

Anyway, I don't recommend it but if you really want to tackle this puzzle the "traditional way", here is a line-format using the values 1-9. But I'd really like to see players using the new set of 9 values just to appreciate the beauty of them.

This is the traditional line format I wrote:006800000090070010300006402100000509000000000602000003507900001030040060000008900

All are welcomed to give it a try!