This is a list of April Fools' jokes that were made on r/polandball, Polandball's Reddit page.
The subreddits of /r/polandball and /r/vexillology were switched with each other.
See 2014 Polandball April Fools for more details. On April 1st 2014, most rules on /r/polandball were lifted to honour 'u/FALCOLAD' coming to Reddit and becoming a moderator. This lead to a lot of low-effort comics being posted.
On April 1st 2015, all submissions had to be in the form of 'advice animal memes' (with countryballs as the protagonist).
An announcement was made banning all countryballs in Polandball comics. Rather, any non-countryballs could be used, such as 4chan and Nokia. There is actually a /r/noncountryballs subreddit.
Polandball comics were permanently banned due to them being 'no longer funny'. Submissions now had to be in textual format, and r/polandball was changed to /r/polandballparagraphs.
Polandball comics were permanently banned again and all submissions had to be in the form of memes with countryball protagonists.
These countryballs are spherical shaped has been ended in Polandball comics, the Poland-anything-but-a-ball can be used for anything shapes.
Polandball was renamed to Polandwojak, and the countryballs were depicted as Wojak faces. There were also a lot of memes on the April Fools, just like the 2018 April Fools joke, but with even more rule breaking.