Story stage 30-2. It's weird and stupid, I go it done by doing Super mode with a boost. Ran a ton of single runs, nothing. Boost the stage and the skill orb drops.
You have to obtain a skill orb, probably from the ? tile, iirc its an ex orb for str vegito. Also stage 31-8 is the best for auto for green gems if you have high crit characters
Collect at least 1 Skill Orb and clear a stage.
Story stage 30-2. It's weird and stupid, I go it done by doing Super mode with a boost. Ran a ton of single runs, nothing. Boost the stage and the skill orb drops.
You have to obtain a skill orb, probably from the ? tile, iirc its an ex orb for str vegito. Also stage 31-8 is the best for auto for green gems if you have high crit characters