Only Energy can levelup heroes.
[1/3] Ways to earn Energy
Every time you finish a sleep session, you can convert sleep time to Energy.
You can also unlock the bedtime reward chest on the Fit Tower by sleeping at your scheduled bedtime.
[2/3] How to get more Energy
You can boost the sleep time to energy conversion rate with Powerups and Buffs.
[3/3] How to level Powerups and Buffs
You need to acquire Runes. They can be collected by completing battle stages and star rewards. Some buffs can only be activated through the super pass.
