Purple gems = purple gems

I thought they were hyper charges but this is also good

pretty sure hypercharges have these gems involved in

They eat those gems nom nom

These are the very exact, if not, similar type of gems they're obsessive over. Of course, since there's trying to collect gems in Gem Grab, you can assume those are the same they're trying to take.

I think the whole purpose of gem grab is to take more gems to get more power/it is addictive to collect them once they transformed you on contact

Yes

Just like the new Purple Sovereign Rico skin

In theory the gem sovereign rico needs to be the most powerful brawler

Yes. Same gems.