Should i do weird route and all secret bosses before chapter 5

should i

How long do you wanna wait before starting Chapter 5?

day one

Well then no, unless you're REALLY good at dodging and really fast at Deltarune

i could right now (spamton neo)

but i wont be able to get eg

I'd say just go back after chapter 5

should i do it on a new file

Nah, you can just take your last save before beating Chapter 1 and reload it, go fight Jevil and/or get the egg, then re-beat King and finish the chapter

From Chapter 2 though you will have to restart fully

i could just do it on my "replay" file where i just get really bored

True, but I think the first method works fine

Also, a tip for when you start the Weird Route, right after getting Noelle but before leaving that room, make a save in the current file slot, and in a second one. That way you don't have to play Chapter 2 twice while getting perfect Weird Route and Non-Weird Route saves

eh i might not even do the wird route or secret bosses

what ya gonna do

i just do the secret stuff when i replay

Everything. I'm gonna do everything.

for chapter 5 ill find/do everything i can

I'd've said yes but it's alr out

i beat it second day after release