Homebrew [Question] PKSM Homebrew - Safety Concerns?

[Zazenora]

Hey everyone,
I can't use Poke'bank at the moment and discovered PKSM.
I was thinking of using it as an alternative for now until I can afford the official bank.

My question is, is it safe to transfer legit poke'mon from older games?
I have several pokemon from previous games that I'm wanting to transfer to Ultra Moon, but I am concerned about using them online.
I don't plan on editting them in any way, just purely transferring.

The games I want to transfer from are: PKMN Yellow, Crystal, Alpha Sappire, and Diamond.
(It'd also be awesome if I could somehow transfer my PKMN from my Emerald on GBA, but that's probably out of the question.)

My biggest concern is really being able to use pokemon that I transfer, online. Will they still be considered legit?
I don't want to push it and make it more likely to recieve a ban anymore than I am already by using Luma CFW.

I've searched around and found a few vague answers, but none of them really went into detail.
If there is already a similar post that addresses these concerns, I apologize and would appreciate someone pointing me in the right direction.

Thanks in advance!