Stage 5 at its peak in China, due to having a lot of seasons and merchandise. It slowly cooled down to stage 3/4 when people grew tired of it, but it looks like it might reach stage 5 again as it's gaining back popularity.
It's always been in stage 0(a) in the West due to a complete lack of exposure to the show, though it's slowly inching towards stage 1 or possibly 2 due to fans spreading the word about the show and getting people interested.
For a while, it was near-impossible to watch the English dubs after they stopped airing. A couple of episodes were uploaded online and there were some camrips of parts of episodes, but it was near-impossible to find full seasons. It was finally rescued when Creative Power Entertaining began uploading full English episodes to YouTube for global audiences.
The websites that hosted early manhua strips went down and CPE didn't put all of the manhua strips on their app, making some early strips hard to find.
Late Export for You: South Korea didn't get one of the movies until a few years after it came out in China.
Long-Runners: It started around 2005, and it is so popular that it now spans 2,000+ episodes, with no signs of stopping. Basically, it's to China what SpongeBob SquarePants is to America.
Marathon Running: Some seasons air really quickly due to their popularity. For example, The Athletic Carousel aired 60 episodes in only 4 days.
The Merch: There are over 1,000 different products aimed at different demographics, including fashion products, home goods, skin products, school items, and different toys and electronic items.
This show is referenced a bit in Happy Heroes. Given that the director of Happy Heroes was also one of the higher-ups on the team creating Pleasant Goat, it makes sense.
One of the monsters is sent flying by Happy S., and is later shown to have landed in a dark ominous place with Wolf Castle in the background.
Big-head Monster: He hit me so hard I have no idea what cartoon I've ended up in!
When Big M. and Little M. are wolves in the fairy tale arc, Big M. remarks that he has suddenly developed a fear of frying pans... then he got hit with a frying pan.
When Mr. Lightbulb is trying to introduce television to the citizens of Planet Mystery, he mentions that one could see shows on it. Aqiang points out that he could do that too, and dresses up as a wolf and says "Dearest sheep, I've arrived!"... Mr. Lightbulb hits him with a frying pan.
The streaming service iQiyi has a search bar. Before you type something in, the search bar might have the placeholder text Pleasant Goat and Big Big Wolf.
Rereleased for Free: Quite a few movies/shows originally costed money to watch before they were put up for free on Youku, iQiyi, and other sites. However, this didn't last because they eventually made you pay to watch some seasons.
Movies came out at a pretty steady and consistent rate up until 2015. After the 2015 movie came out, fans had to wait 6 years for the next movie to come out in 2021.
Mighty Little Defenders was due to air in summer 2018, but they had to edit the show to make it more suitable for children and families. Because of this, it was delayed to winter 2019.
Troubled Production: Mighty Little Defenders had a troubled development for half a year. The National Radio and Television Administration forced Creative Power Entertaining to edit the fighting scenes to make them more suitable for kids. They also forced CPE to change the weapons. This caused the season to come out much later than expected.