DRAGON BALL: Sparking! ZERO

This side path is unlocked in Vegetas saga in the "Wind-Up Doll" episode.

You must be on normal difficulty to unlock the branching path. The objective is to beat Android 18 within a certain time limit.

A way to win fast is to charge to 3 bars of ki at the start of the round and use a meteor smash straight away (RT+Y). If it misses or is blocked you can restart the battle and it doesn't take long. Then as she is launched away charge to full sparking mode. In sparking mode get in close(dragon dash with RT+A) and spam X, then eventually press Y and immediately use you're Ultimate attack (RT+B).

Next is the "Vegeta and Trunks" episode. You need to get Trunks low on health in a short amount of time to continue this path. This can be pretty hard as the amount of time is really short. If Trunks says "Maybe I shouldn't bother" then you've taken too long. Try to get into sparking mode as soon as possible and spam X up close until you're sparking has almost run out, then use you're Ultimate attack (RT+B). If you are fast enough Trunks will transform into super Trunks who you will then need to beat. This episode may take a few tries and some luck.

You can complete the rest of the episodes on easy difficulty. Once you get through all the episodes and get you the achievement at the end of the episode "Parental Bond".