Things you should probably add to the character sheet: 

Appearance; kinda gotta have some idea what everyone's character looks like, yeah? Even amongst like species there are variations in looks/builds etc. 

Skills/Abilities; while it will go without saying that everyone in this will have some level of Ki-based prowess, it helps, especially in a DBZ RP, to establish what sort of techniques, skills and transformations they've achieved/developed/mastered, rather than pulling things completely out of thin air (IE, a character just suddenly doing an at-will SSJ transformation in the middle of a fight). 

And yeah, I must echo the above post in that there should be a starting cap on power ranges. I'd personally suggest defining PLs similarly to the way it's been set up from the DB Multiverse fan series: http://dragonballmultiverse.wikia.com/wiki/Power_Levels

Basically just setting ranges of comparable PLs, within which all included characters are considered even in terms of their sheer power.