I have 25 textbuttons, how can I make it so that I don't have to type 25 different functions?

I do this a lot whenever I'm making a main menu. It saves space and makes debugging a lot easier if you do it cleanly.

To accomplish this, we can hold all the buttons in a central place (i.e. in a ScreenGui) and we can loop through them. Then, we can connect an event to them. Here's an example.

local Players = game:GetService("Players")
local player = Players.LocalPlayer
local PlayerGui = player:WaitForChild("PlayerGui")
local MainMenu = PlayerGui:WaitForChild("MainMenu") --you could just have the local script inside the main menu, but whatever

for _,v in pairs(MainMenu:GetChildren()) do
   if v:IsA("TextButton") then
      v.MouseButton1Click:Connect(function()
         print(v.Name .. " was clicked!")
      end)
   end
end)

The usage will obviously vary depending on your situation. You didn't give much detail, so I can't include much more in this answer. Good luck!

Accept and upvote if this helps!