My fave Kirby theory

When we see Meta Knight and King Dedede fight their evil selves (don't remember which game lol) King Dedede is able to defeat his evil clone whereas Meta Knight cannot. This could represent how King Dedede can accept and overcome his flaws as a person and defeat his clone. He could defeat his 'bad' side and grow as a person as a result, but because Meta Knight couldn't beat his 'bad' side this may represent how cannot accept his flaws and therefore, is unable to grow as a person.

But of course this is just a theory :)

Also I find the lore behind characters such as Queen Sectionia, Taranza, Magolor & Marx super interesting. I'm also fascinated by the lore of the forgotten land.