Inkay is a Dark/Psychic-type Pokémon introduced in Pokémon X and Y, found in the wild in the grassy area of Route 8, and is categorized within the Pokédex at #686 as the "Revolving Pokémon". It evolves into Malamar starting at level 30 if it levels up while the game system is flipped upside-down.
Topsy-Turvy is a Dark-type move, the signature move of Inkay and Malamar, which reverses all stat changes of the targeted Pokémon.
Inkay appears in Super Smash Bros. 4 as a Poké Ball summon. It uses Topsy-Turvy, turning upside-down: every time it touches the ground, all enemy players on the ground will trip.
Inkay may look like a Water-type Pokémon, but it's actually a Dark/Psychic type! Once it has reached the proper level, Inkay can evolve into Malamar if you hold the Nintendo 3DS upside down. In Smash Bros., its Topsy-Turvy move will flip anyone who wanders too close upside down. Watch out!
A Pokémon that looks this much like a squid MUST be a Water-type, right? Wrong! It's a Dark- and Psychic-type. If you're struggling to get it to evolve, try holding your system upside down. In this game, Inkay's Topsy-Turvy move can knock you over, and you won't be much use like that, so watch out!