Street Fighter 6 is the first entry in the series in a long time to feature an expensive single-player mode called World Tour where players can use their avatar character to travel the world and discover the meaning of strength.
On this journey, players will meet a lot of different characters, and some of these Legendary Fighters they will meet will teach them everything they know. Unfortunately, not all of their special moves will become available for your character as soon as you enroll with any of these masters. Like for everything worth having, you will have to work hard to expand your combat possibilities.
The most basic of ways to rank up a Style is to equip it as your main Style. To do so, open up your smartphone, pick the Stats app, go to the Gear tab, and select Style. Here, you will find all the Styles you have unlocked so far. By defeating any opponent with a certain Style equipped, you will gain Experience Points for it and eventually rank it up once you have obtained enough.
There are ways, thankfully, to earn Experience Points for Styles that are not currently equipped. As you approach any fightable character in any of the game's locations, a small window will appear above their heads to provide basic information on the character, such as level, bonus items that can be obtained by meeting certain conditions, and more. If you see a small picture of one of the Street Fighter 6 main characters to the right of the information window, it means that that fighter is a student of the depicted character, so if you defeat them, you will gain Experience Points for that particular Style as well. Some of these opponents can also grant additional Experience Points if certain conditions are met, so make sure to fulfill them to speed up your grinding. Additionally, once you unlock Drone Delivery in Metro City by completing the Drone Delivery sub mission, you will be able to purchase an item that increases Style Experience gain for a set amount of time, which will further speed up grinding.
Unfortunately, once you defeat an opponent in Street Fighter 6 World Tour mode, you cannot challenge them again until a new story Chapter begins, so you cannot fight them repeatedly. Do keep track of them, however, so that you can fight them again when a new Chapter begins to get those sweet extra Experience Points and unlock even more combat options.