Check the Clothing Store and Inventory Often
Sometimes, clothes are more than just a fashion statement, and Dragon Ball XenoVerse wears this belief right on its sleeve. There are literally hundreds of clothing items to choose from (although some are race specific). Between them, you have several different different stat boosts to mix and match as you see fit. This is something that can definitely be used to your advantage as you figure out what build you want to approach for your created character.
At the beginning, Dragon Ball XenoVerse only provides you with the bare essentials in your inventory and at the shop in Toki-Toki City. Over time, you will collect many new items, and at the same time, new options will become available to purchase. It is wise to check back after every few missions or so. Sometimes the only thing standing between you and victory is the right pair of pants.