The max level on Battlers in TBB appears to be 30 right now, based on current community reports; one post says unit level cap is 30 and that the next chapter would raise it to 35.

Quick Scoop

  • Current cap: 30 for battlers/units.
  • How it works: the cap rises by 5 each time a main chapter is completed, according to the same discussion.
  • Likely next cap: 35 once the next chapter is released, if that progression stays the same.

Note

A wiki result confirms Battlers are the deployable units in The Battle Bricks, but it does not state the level cap directly.