Quote from Splatulated;1209681:
never played previous games unless you count paper mario 64 .-. (this game seems really similar at least with badges and the combat)
i dont know what im doing .-. what if i just put all bonus points into BP forever ?
You'd want to spread out bonus points because the maximum amount that a stat can get is reduced if you keep putting too many bonus points into that single stat. You can always look at what a brother needs or is lacking, and just distribute all those bonus points into those stats he doesn't excel at(Mario generally has higher HP, Speed, and POW, while Luigi has higher BP and Defense). You could also just use one bonus point on each stat every 6 levels. Alternatively, you could tier the stats by importance and rank them when they reach a good bonus point range(4+ being the max on the spinner thing, or 3+ for BP):
Pow > HP > BP > Stache > Defense > Speed.
That's my own view on the stat system though. It's really your own choice on how you build the two.