Kuririn Zenkai?

[Let's Go Fearless!]

I know it's been discussed before and i haven't find any reason why he was getting stronger from Ginyu to Freeza arc especially Vegeta stated that Krilin's power was steadily increasing.

Chapter: 295 (DBZ 101), P9.1-5
Vegeta: “We can win! If the 3 of us fight together, we’ll be able to win somehow or another! [ ] It seems that even Freeza hasn’t noticed…These two’s battle power is steadily rising… The squirt in particular hides so much inner strength that he doesn’t even know it himself…And I’m in the process of becoming what you’re afraid of: a Super Saiyan…!”

 

[GokhanDBZfan]

Grand Elder's power up.

 

[Let's Go Fearless!]

Huge potential then....

 

[Jeff Styles]

The power up he and Gohan got from Guru must have still increases their power overtime in order for them to be somewhat close to Freeza.

 

[Let's Go Fearless!]

I think that explain the ''steadily increasing'' thing.

 

[Jeff Styles]

Yeah, it should explain Vegeta's statement well.

 

[kriss-]

Grand Elder's power up.

I was about to say that.

 

[Papasmurf]

They got random boosts after every fight for some reason