Iggy rhymes too? Forgot that. I think you even told me he did before somewhere. We do not have to mention every similarity.
They are both royalty among an antagonistic race. They also remain the best recurring villains for me. ^_^ Both have also been defeated by "side kicks" and captured main heroes.
Yep, you showed me that before. I suck with my memory. Wow.
They are all Gameboy villains who have not appeared again as a primary villain. Some might say they also like coins and money, like somebody else I know, who shall remain nameless!
Mario and Zip Toad are famous, while the latter and Professor Frankly are of two species that debuted in 1985. Other than that, I really don't know what else to say.
It's cool, man. You do not have to get all the connections. They were all also copied by Doopliss at one point.
They are all purple and Elder Princess Shroob, Shadow Queen, and Antasma were all sealed at one point. Antasma and Elder Princess Shroob swear revenge in the future.
They are all villains who command a group of minions. Fawful, Smithy, and Count Bleck talked in odd manners. Cackletta did not speak like a normal person either.
All three appear in Donkey Kong Country games as a "special" world with levels that combine multiple types. They all take some form of currency to help progress through or to open the world.