What happened to Skulker's weapons in Prisoners of Love?
Let me say this first- I know this show isn't consistent. Technus is in his mech form in this episode when he should be in his 1.0 form. I don't think the writers thought of explanations for half the stuff they did.
But this blog is about in-universe analysis, not out-of-universe analysis, so let's get going.
In the episode Prisoners of Love, Skulker doesn't have access to his weapons, despite being in his mech suit. He's seen having to use the guards' weapons against them. (Or just brute physical force!)
There isn't anything in the prison that blocks ghosts' abilities, as the Lunch Lady is still able to summon food. Besides, as we see later in Micro Management, Skulker's mech suit is unaffected by things that would block ghost abilities.
However, I have a theory.
Here is a helpful diagram of where Skulker's weapons are located, indicated in red. His gauntlets and his arms, mostly, although some come out of his belt.
In his prison jumpsuit, Skulker's gauntlets have been notably removed, and so has his belt.
What's more, the other areas weapons are located are all covered up, blocking the weapons from deploying.
In conclusion, I believe that the in-universe reason Skulker does not have his weapons in Prisoners of Love is because they were either confiscated or restrained.