how do i get into the basetment i'm at day 22 i have talked to Freddina but i have not seen any any new dialogue option
In the shop buy it, but if it doesn't show up, you need to talk to other characters.
You need a flashlight, buy one, then you can go there. And btw, don't forget to enter the endo room while you're still with puppet, if you don't that room will be softlocked and you won't be able to enter.