They don't. They LOVE Mudkipz.
To answer, though, it is an ongoing joke called a meme, most likely spawned by the site 4chan.org.
There are a lot of people that have different opinions on this Pokemon.
Well you see you either like mudkipz or you don't, either way mudkipz like you.
So... I heard you like mudkipz?
Yes i do Yes, I do. I luuuuuuuuuuuuuurve Mudkipz!
| leik Mudkipz, do u liek mudkipz?
Becoz they have some relationz to mudkipz, and i herd you liek mudkipz? Do you? i need a poo
mudkipz sweet little mudfishys that live in the sewage of japan...sometime they squirt stuff at you,, there poisonous to touch tho, and they are ugly.i like them thodo you? Well, in soviet russia mudkipz liek you!!!!They're a REALLY cute Pokemon. The Liek dem thing started in a parody song, and then the madness continued on YouTube and 4Chan.
So, I herd u liek mudkipz?
Mudkipz are a vital part of your diet.
MUDKIPZ
Heck yeah!
Use Mudkipz