In the spin-off game Pokémon Ultra Fire Red XD, Clovenix has alternate form called "Shadow Clovenix" which is a Grass/Ghost type. Its canonicity is debatable however, as the events of the game take place inside of Kanye's mind.
Clovenix, along with Scytill, has the highest base Speed stat of all Pokémon.
Clovenix has the highest base stat total of all Pokémon.
Clovenix's BST ties with Arceus, although a bit more emphasized in Speed, Attack, and Special Attack.
Clovenix is the only Pokémon to give 18 EVs if defeated in battle.
Clovenix shares some similarities with the real Pokémon, Ho-Oh, as both have the Fire Type, have the Signature move, Sacred Fire, and both have Regenerator as their ability (In Ho-Oh's case it's Hidden Ability) and both can hold the Sacred Ash.
Before the official release of Clover, the shiny form had a green head rather than black.
Clovenix's cry is a modified version of Yveltal's.
Clovenix is based on 4chan's logo.
Clovenix's name is a combination of Clover and Phoenix.