Pickup not working?

[Whales 12]

I just trained 3 level 91 linoones and they haven't picked anything up. What am I doing wrong?

[Lucifer Morningstar 39]

Interesting. 

I carried around a Meowth for the first two badges worth of the plot and around level 26-27 her pickup reduced in function heavily. 

I've recently been made fully aware that it's a 10% chance and it's after battles that it applies but up until that point, she'd found me 10 Great Balls, about 6 Choco Candies, about 5 Dusk Balls a few ultra potions and a few blast powders. 
I found it a bit strange that her pickup functionality went from that nothing but an occasional super repel (though I appreciated those as well as money fodder since most trainer payouts are very low due to the region's extreme state of poverty).  

It was difficult, I even prevented her from evolving for a couple of levels but it got to the extent that I had to replace her on my team because she's ass in battle so as much as I love her she's a waste of a slot, at least as a Meowth. I hate that Persian can't maintain Pickup like Linoon and Linoon isn't all that useful in battle either.  
 

[Xander 25]

There's a mod that lets you change the pickup chance. See if that helps.

 

[Lucifer Morningstar 39]

Oh wow. 
I'm afraid I am not savvy with that stuff but hopefully it helps the OP. 

[Whales 12]

Not really wanting to use mods, my problem is that it is not giving me the 10% chance

[zaqrwe 10]

How many battles you fought with these Linoones, to be so sure it's not working?