i heard a certain plushie? is that right? anything else? can you give specific names? thank you muches!!!! do you just click on the item and use the activation option?

btw merry springtime!

and :D I believe the donadak gives 2 and montre gives 1

Yes it's these plushies to be exact:

The montre plushie gives you 1 extra slot and the Donadak plushie gives you 2 extra slots ^^ You can buy them at the cash shop.

nobody's selling them. is there a certain way to obtain them or is there none left? :O?

They are available in the cash shop :) You can buy cash shop credits from usershops to get them.