I am trying to write a formula where I do a lookup of anything ("same cell ie
D10) in every sheet. I want to have the NAME of the 50 sheets in column B,
from B2 to B51. And in column C, create a formula for each respective cell
where I look for the value of D10 from that sheet where I do the lookup. So
create one formula in C2, and drag down to C51.

So if in Cell B3 I have the name January, and in B4 February.....in cell C3,
create formula that looks the name of the sheet written in cell B3, and then
goes a looks for the value of ie cell D10 into the sheet called January. And
in the Cell C4 the formula looks for the value of cell D10 in the sheet name
from cel B4, so goes to February. etc etc