any head cannons on the white ones (naga and waverns species)
I took this to mean the attribute category, rather than the species (since they appear to be Dragonoid off-shoots.)
The white ones, ashen ones, attributeless, what have you, are the bakugan equivalent of sun-bleached. They do have an attribute leaning, but they don't look the part at all.
Any white ones pre Dragonoid Core got absorbed into Vestroia (the planet.) This does not prevent them from appearing mid botched evolution though.
Their forms are generally weak, and have a rough time evolving because they're prone to just. exploding.
Some bakugan call them ghosts. It's also considered bad luck to meet a white one as a result, because the most infamous was directly related to the doom dimension.
Very easily influenced by Trap Bakugan, given their capability to change the attribute of their allies. Some are weaker than Trap Bakugan in terms of G Power.
Some white ones get absorbed by their closest friends, on purpose no less. Typically they act as an addition to the G Power pool a bakugan has, or even to strengthen their friend's senses.
There has been at least one human who absorbed a white one. This was not on purpose, and occurred during Naga's invasion of Earth. The effects haven't been noted just yet, mostly because the human in question is doing their damndest to hide it.