The Kirby Encyclopedia:Article size

Articles that become too long should be split into multiple, smaller articles. The reasoning behind this is to increase the readability and reduce the load time for any given article.

Splitting an article usually entails taking lengthy or overly-detailed sections of an article and creating a new article for that topic. The section then remains on the original article, the template is used to link to the new article, and a much more top-level summary is given in that section of the original article. For example, summarizing the "History" section of Kirby to give a much more top-level overview and using to link to a new page entitled "History of Kirby".

This policy does not apply to list or table pages, such as List of characters, just actual articles.

Rule of thumb
The page size for our longest articles is given in Special:LongPages. The table below summarizes when an article may need to be split based on page size.