=====I uploaded an image and added it over to Bulbapedia, but why isn't it showing up?=====
Bulbagarden runs on
different servers. As such, some are not on the same server. This is the case for the Archives and Bulbaedia. Sometimes images do not show up on the site, even if they were uploaded here. Usually a hard refresh, dry edit or a purge of the page will force the image to show up sometimes. Please don't upload the image more than once if it does not show up on the pedia. To avoid running into this problem, it is best if you upload the image before you link to it on Bulbapedia
=====Someone mentioned that I shouldn't be using jpgs, why?=====
JPGs are allowed for certain images, mostly images such as for the TCG. We generally would like
pngs to be used for images like anime screenshots, game or anime artwork and scans. PNGs generally look better in thumbnails on the Pedia where they are scaled down. Remember to always use lowercase extensions! That means .png and not .PNG and if you're using .jpgs, it's .jpg not .JPG or .JPEG. Many templates on Bulbapedia use lowercase extensions so it is imperative that you follow this format.