Help Pickup

[Blue]

I don't know if this is possible but my Chyinmunk is picking up Items after every battle is it possibly glitched?

No, that's its normal ability "Pickup". You can find out  more here: http://pokemon-uranium.wikia.com/wiki/Pickup_(ability)
Notice the Pickup chart (in that page) to get the rare items you want.

Im just not used to seeing Pickup happen after every battle it really surprized me thanks.

It's super helpful if you're playing on Nuzlocke Mode