What do the styles do? I have them all unlocked but I don’t know what they do.
They majorly increase and decrease specific stats when you equip a Spirit that has learned it's style.
Demon Style - Increases Offense, but decreases Defense.
Land Style - Increases Attack Power when on the Ground and Move Speed, but decreases Attack Power in the Air and Jump height.
Air Style - Increases Attack Power when in the Air and Jump Height, but decreases Attack Power when on the Ground and Move Speed.
Brick-wall Style - Increases Defense, but decreases Offense.
Boulder Style - Increases Defense and Move Speed, but decreases Offense and Jump height.
Big Bee Style - Increases Defense, Jump Height and Weight, but decreases Offense and Move Speed.
Runner Style - Increases Move Speed, but decreases Jump height.
Gravity Style - Increases Jump height, but decreases Move Speed and Fall Speed.
Tank Style - Increase Offense and Defense, but decreases Move Speed and Jump.
Lightweight Style - Increases Move Speed and Jump, but decreases Offense, Defense and Weight.
Strategist Style - Increases Power from Special Moves, but decreases Power from Regular Moves, Throws and Items.
Equipment Style - Increases Damage from Items and Healing Amount from Items, but decreases Power from Regular & Special Attacks and Throws.
Overthrow Style - Increase Power from Throws, as well as Grab Range and Power, but decreases Power from Regular & Special Attacks and Items.
Ninja Style - Increases Throw Power, Grab Power, Damage from Items, Move Speed and Fall Speed, but decreases Power from Regular & Special Moves, Defense and Weight.
Forgetful Style - It just makes the fighter unequip their currant style if you don't wish to use a style.
Basically, while it adds for creativity with your Spirits, some styles are very useful with some Characters & Spirits for Spirit Battles. Land Style is great with Little Mac. Any Offense Style or Land Style are great with Spirits that make you Giant, like Uprising Medusa or Metal Face or good with Spirits that can equip the Giant Zapfish to become Giant. Equipment Style is good for 3-Slot Spirits when you can use the Cyrus & Reese Spirit to equip an Ore Club. Either way, they aren't entirely worthless and are good with some Spirits to make some Spirit Battles easier.