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If we are to assume that by their placeholder names and the way they are colored, each color actually hints at their typing...
Pop idol mermaid would be Water/Fairy (because its placeholder name is blue and pink)
Heel tiger would be Fire/Dark (because its placeholder name is red and black)
The owl is a whole different story though...
image pretty much related.
Don't ask me why I put Fire in there, it looked similarly colored, but that's practically impossible. It's either going to be Grass/Flying or, according to the color name codes, Grass/Ground.