Typically, training items are level-restricted by fighter class, but this trick allows you overcome those limits for some fighters.

Choose a fighter near, but not fully, at level cap.

not fully, at level cap. Place him in a training ground (preferably 10x) for his current fighter class.

Level him to cap and limit break to the next fighter class.

The fighter will finish training at his new level cap, without any XP waste!

With this trick, your fighter can train to Level 1280 with 10x Crate of Milk Bottles!

Example

Adept Krillin SP gaining XP in Wasteland, which is typically restricted to Level 300 ~ 599 fighters.

Krillin SP was a 598/600 Fighter, so he can be placed in the Training Weights (200kg) x10 training ground.



Now level Krillin SP to level cap and limit break, as a result, he'll leave the Wasteland training ground at Lv793, instead of the typical Lv600 level limit for a Fighter.