Learning about Trash Bytes

[AnonAnon]

Hello. I am fairly new to genning pokemon, and I attempting to make them look as legal as possible. 

I am very unclear on how trash bytes work. Do pretty much all pokemon you Gen from the encounter database in PkHex need their trash bytes fixed or altered?

I did a basic search of this forum for Trash Bytes, but a lot of it went over my head. Where would be a good place to start learning about how to correct Trash Bytes for pokemon you make with PkHex?

Thank you in advance for any help you can offer.

[Kaphotics]

string buffers are allocated and reused, meaning that the previous usage of that memory may have had data (not zeroes).

renaming a pokemon does not clear the buffer, so longer nicknames will remain hidden underneath the new nickname & terminator.

for generation 4+ encounters, you are fine grabbing from the database without modification; gens 1-3 do have trash bytes that are poorly understood, but don't matter when transferred to recent games (cleared/reset).