Quoted By:
>Fomantis/Lurantis
Grass types posing as bugs. Makes sense because you expect one type but get something else.
>Inkay/Malamar
Psychic/Dark are opposites of each other, evolutions are reversed.
>Spinda
Confused pokemon, confusion => do opposite => contrary
>Shuckle
I don't really know, but it's designed to be unorthodox: super min-maxed stats, access to things like Power Swap, etc.
So what is the explanation for pic related?